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Sample records for ad contact boeing

  1. 78 FR 52836 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-27

    ...-352-AD; Amendment 39-17529; AD 2013-15-13] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for all The Boeing Company Model 757 airplanes. This AD was prompted... October 1, 2013. ADDRESSES: For service information identified in this AD, contact Boeing...

  2. 78 FR 52838 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-27

    ...-354-AD; Amendment 39-17533; AD 2013-15-17] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, -900... information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services...

  3. 78 FR 3365 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-16

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company...). SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Airplanes... holidays. For service information identified in this proposed AD, contact Boeing Commercial...

  4. 76 FR 77937 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-15

    ...). SUMMARY: We propose to adopt a new airworthiness directive (AD) for all The Boeing Company Model 777... lower housing to verify that the cross bolts are correctly installed and that there are no missing fuse..., contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC...

  5. 78 FR 33012 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-03

    ..., or because of isolated situations or incidents such as material defects, poor fabrication quality, or... AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H... availability of this material at the FAA, call 425-227-1221. Examining the AD Docket You may examine the...

  6. 78 FR 22185 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-15

    ...-140-AD; Amendment 39-17415; AD 2013-07-11] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... superseding an existing airworthiness directive (AD) for certain The Boeing Company Model 777-200, -200LR... (74 FR 62217, November 27, 2009), and adding the following new AD: 2013-07-11 The Boeing...

  7. 78 FR 72558 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-03

    ...-194-AD; Amendment 39-17687; AD 2013-24-13] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 737-100, -200, -200C, -300, -400... airworthiness directive (AD): 2013-24-13 The Boeing Company: Amendment 39-17687; Docket No. FAA-...

  8. 78 FR 38550 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-27

    ...-226-AD; Amendment 39-17493; AD 2013-13-05] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for all The Boeing Company Model 747SP series airplanes, and certain The Boeing Company Model 747-100B SUD and 747-300 series airplanes. This AD was prompted by...

  9. 78 FR 52419 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-23

    ...-128-AD; Amendment 39-17555; AD 2013-16-17] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for all The Boeing Company Model 727, 727C, 727-100, 727-100C, 727... airworthiness directive (AD): 2013-16-17 The Boeing Company: Amendment 39-17555 ; Docket No. ]...

  10. 78 FR 22172 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-15

    ...-070-AD; Amendment 39-17412; AD 2013-07-08] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 757 airplanes. This AD was...): 2013-07-08 The Boeing Company: Amendment 39-17412; Docket No. FAA- 2011-1094; Directorate...

  11. 78 FR 28729 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-16

    ...-172-AD; Amendment 39-17455; AD 2013-10-02] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... superseding an existing airworthiness directive (AD) for certain The Boeing Company Model 757-200 and -200PF... following new AD: 2013-10-02 The Boeing Company: Amendment 39-17455; Docket No. FAA- 2012-1109;...

  12. 78 FR 72561 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-03

    ...-241-AD; Amendment 39-17685; AD 2013-24-11] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 747-100, 747-100B, 747-100B SUD... airworthiness directive (AD): 2013-24-11 The Boeing Company: Amendment 39-17685; Docket No. FAA-...

  13. 77 FR 73282 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-10

    ...-268-AD; Amendment 39-17278; AD 2012-24-08] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, -900... airworthiness directive (AD): 2012-24-08 The Boeing Company: Amendment 39-17278; Docket No. FAA-...

  14. 77 FR 69739 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-21

    ...-212-AD; Amendment 39-17238; AD 2012-22-02] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 747-400, -400D, and -400F series...): 2012-22-02 The Boeing Company: Amendment 39-17238; Docket No. FAA- 2012-0498; Directorate...

  15. 78 FR 72564 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-03

    ...-135-AD; Amendment 39-17684; AD 2013-24-10] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 757 and Model 767 airplanes...): 2013-24-10 The Boeing Company: Amendment 39-17684; Docket No. FAA- 2012-1229; Directorate...

  16. 78 FR 22215 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-15

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company... Boeing Company Model 757 series airplanes equipped with Rolls-Royce RB211 engines. The existing AD..., 2004), and adding the following new AD: The Boeing Company: Docket No. FAA-2013-0326;...

  17. 77 FR 34876 - Airworthiness Directives; The Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-12

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company...: We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 777.... 39.13 by adding the following new airworthiness directive (AD): The Boeing Company: Docket No....

  18. 78 FR 6202 - Airworthiness Directives; the Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-30

    ...-191-AD; Amendment 39-17326; AD 2013-02-05] RIN 2120-AA64 Airworthiness Directives; the Boeing Company... airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER...): 2013-02-05 The Boeing Company: Amendment 39-17326; Docket No. FAA-2011-0258; Directorate...

  19. 78 FR 6200 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-30

    ...-131-AD; Amendment 39-17328; AD 2013-02-07] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, -900...): 2013-02-07 The Boeing Company: Amendment 39-17328; Docket No. FAA-2012-0183; Directorate...

  20. 77 FR 75402 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-20

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company...). SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 757... directive (AD): The Boeing Company: Docket No. FAA-2012-1229; Directorate Identifier 2012-NM-135-AD....

  1. 78 FR 22178 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-15

    ...-094-AD; Amendment 39-17413; AD 2013-07-09] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 737-700, -700C, -800, and -900ER... The Boeing Company: Amendment 39-17413 ; Docket No. FAA- 2010-1042; Directorate Identifier...

  2. 78 FR 70851 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-27

    ...-209-AD; Amendment 39-17675; AD 2013-24-01] RIN 2120-AA64 Airworthiness Directives; The Boeing Company.... SUMMARY: We are adopting a new airworthiness directive (AD) for The Boeing Company Model 747-8 and 747-8F... The Boeing Company: Amendment 39-17675; Docket No. FAA- 2013-0974; Directorate Identifier...

  3. 78 FR 28767 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-16

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company...). SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747... directive (AD): The Boeing Company: Docket No. FAA-2013-0420; Directorate Identifier 2011-NM-241-AD....

  4. 78 FR 72550 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-03

    ...-057-AD; Amendment 39-17681; AD 2013-24-07] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 707 airplanes; and Model 720 and... considered the comment received. The Boeing Company stated that it supports the NPRM (78 FR 49237, August...

  5. 78 FR 6251 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-30

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company...). SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 767... FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): The Boeing...

  6. 78 FR 49379 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-14

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company...). SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 757... directive (AD): The Boeing Company: Docket No. FAA-2013-0693; Directorate Identifier 2013-NM-059-AD....

  7. 78 FR 22182 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-15

    ...-107-AD; Amendment 39-17411; AD 2013-07-07] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for all The Boeing Company Model 737-600, -700, -700C, -800, -900... The Boeing Company: Amendment 39-17411; Docket No. FAA- 2012-0933; Directorate Identifier...

  8. 75 FR 57885 - Airworthiness Directives; The Boeing Company Model 737-600, -700, -700C, -800, and -900 Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-23

    ... undetected output from a single radio altimeter channel, which resulted in premature autothrottle retard during approach. We are proposing this AD to detect and correct erroneous output from a radio altimeter... holidays. For service information identified in this proposed AD, contact Boeing Commercial...

  9. 78 FR 8999 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-07

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company...). SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747... airworthiness directive (AD): The Boeing Company: Docket No. FAA-2013-0089; Directorate Identifier...

  10. 78 FR 23866 - Airworthiness Directives; the Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-23

    ... Directives; the Boeing Company AGENCY: Federal Aviation Administration (FAA), Department of Transportation... (NPRM) that proposed a new airworthiness directive (AD) for certain The Boeing Company Model 777-200...

  11. 78 FR 13463 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-28

    ...-042-AD; Amendment 39-17284; AD 2012-25-03] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... FAA is correcting an airworthiness directive (AD) that published in the Federal Register. That AD applies to certain The Boeing Company Model 757 airplanes. That AD incorrectly identified certain...

  12. 78 FR 6254 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-30

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company... directive (AD) for all The Boeing Company Model 737-300, -400, and -500 series airplanes. That NPRM proposed... all The Boeing Company Model 737-300, -400, and -500 series airplanes. That NPRM published in...

  13. 77 FR 51724 - Airworthiness Directives; The Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-27

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company... directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, - 900, and -900ER series... apply to certain The Boeing Company Model 737-600, -700, -700C, - 800, -900, and -900ER series...

  14. 78 FR 27020 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-09

    ...-186-AD; Amendment 39-17429; AD 2012-18-13 R1] RIN 2120-AA64 Airworthiness Directives; The Boeing... revising an existing airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series ] airplanes. That AD currently requires repetitive inspections to...

  15. 78 FR 12231 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-22

    ...-016-AD; Amendment 39-17366; AD 2013-02-51] RIN 2120-AA64 Airworthiness Directives; The Boeing Company.... SUMMARY: We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 787-8 airplanes. This emergency AD was sent previously to all known U.S. owners and operators of these...

  16. 77 FR 26945 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-08

    ...-058-AD; Amendment 39-17041; AD 2012-09-06] RIN 2120-AA64 Airworthiness Directives; The Boeing Company... new airworthiness directive (AD) for certain The Boeing Company Model 737-700 series airplanes. This AD was prompted by reports that the aft seat leg fittings span the station (STA) 521.45...

  17. 78 FR 6247 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-30

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; the Boeing Company... Company Model 757 airplanes. The existing AD currently requires revising the maintenance program by..., 2012), for all The Boeing Company Model 757 airplanes. That AD superseded AD 2008-10-11, Amendment...

  18. 78 FR 43839 - Airworthiness Directives; the Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-22

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; the Boeing Company... Company Model 747 series airplanes. The existing AD currently requires repetitive detailed inspections to..., 1994), and adding the following new AD: The Boeing Company: Docket No. FAA-2013-0625;...

  19. 76 FR 68666 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-07

    ... Airworthiness Directives; The Boeing Company Airplanes AGENCY: Federal Aviation Administration (FAA), DOT... (AD) for certain The Boeing Company Model 737-100, -200, -200C, and -300 series airplanes. This proposed AD was prompted by a report from the airplane manufacturer that airplanes were assembled with...

  20. 77 FR 55681 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-11

    ... Material of the Components of the Horizontal Stabilizer For airplanes identified in Boeing 707 Alert...-17176; AD 2012-17-13] RIN 2120-AA64 Airworthiness Directives; The Boeing Company Airplanes AGENCY... -100B short body series airplanes; Model 707-300, -300B, -300C, and - 400 series airplanes; and...

  1. 78 FR 23691 - Airworthiness Directives; the Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-22

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; the Boeing Company... airworthiness directive (AD) for certain The Boeing Company Model 777-200 series airplanes. The proposed...

  2. 78 FR 23685 - Airworthiness Directives; The Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-22

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company... airworthiness directive (AD) for certain The Boeing Company Model 777-200 and -300 series airplanes....

  3. 78 FR 23690 - Airworthiness Directives; The Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-22

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company... airworthiness directive (AD) for certain The Boeing Company Model 777-200 series airplanes. The proposed...

  4. Boeing P-26A

    NASA Technical Reports Server (NTRS)

    1937-01-01

    Boeing P-26A: Popularly called the 'Peashooter,' the Boeing P-26A was the Boeing model 266. Powered by the Pratt & Whitney Wasp radial engine, the P-26 was the Army's front-line fighter during the mid-1930's. The P-26 held the distinction of being the Army's first monoplane fighter. This example had a reference line painted on its side by the NACA shortly after its arrival at Langley Field.

  5. Loftin Collection - Boeing Aircraft

    NASA Technical Reports Server (NTRS)

    1933-01-01

    Either a F2B-1 or F3B-1, both aircraft were built by Boeing and both were powered by Pratt and Whitney Wasp engines. These fighters were intended for Navy shipboard use. Boeing F3B-1: While most Boeing F3B-1s served the U. S. Navy aircraft carriers the Lexington and the Saratoga, this example flew in NACA hands at the Langley Memorial Aeronautical Laboratory in the late 1920's. Also known as the Boeing Model 77, the aircraft was the next to last F3B-1 build in November 1928.

  6. 77 FR 26993 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-08

    ... require replacing titanium seat track bolts with corrosion resistant steel (CRES) bolts, repetitive... procedures for replacing titanium seat track bolts with CRES bolts, repetitive inspections for cracking of... include contacting Boeing for repair instructions, repairing, replacing missing or severed titanium...

  7. Boeing YP-29A

    NASA Technical Reports Server (NTRS)

    1938-01-01

    Boeing YP-29A: The YP-29A originally was an enclosed cockpit fighter with a NACA cowling around the Pratt and Whitney Wasp power plant, but was modified to this configuration with a Townend ring around the Wasp and an open cockpit. The redesigned headrest which extended to the tail surfaces was reminiscent of, and substantially larger than that on the Boeing

  8. 78 FR 42411 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-16

    ... correct an acronym from ``TFE'' to ``PTFE.'' Boeing stated that the proper acronym for polytetrafluoroethylene is ``PTFE.'' We disagree with changing the acronym in this AD. The service information required...

  9. 76 FR 66200 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-26

    .... Send your comments to an address listed under the ADDRESSES section. Include ``Docket No. FAA-2011-1094... following new airworthiness directive (AD): The Boeing Company: Docket No. FAA-2011-1094;...

  10. Antifungal activity by vapor contact of essential oils added to amaranth, chitosan, or starch edible films.

    PubMed

    Avila-Sosa, Raúl; Palou, Enrique; Jiménez Munguía, María Teresa; Nevárez-Moorillón, Guadalupe Virginia; Navarro Cruz, Addí Rhode; López-Malo, Aurelio

    2012-02-01

    Antimicrobial agents can be incorporated into edible films to provide microbiological stability, since films can be used as carriers of a variety of additives to extend product shelf life and reduce the risk of microbial growth on food surfaces. Addition of antimicrobial agents to edible films offers advantages such as the use of small antimicrobial concentrations and low diffusion rates. The aim of this study was to evaluate inhibition by vapor contact of Aspergillus niger and Penicillium digitatum by selected concentrations of Mexican oregano (Lippia berlandieri Schauer), cinnamon (Cinnamomum verum) or lemongrass (Cymbopogon citratus) essential oils (EOs) added to amaranth, chitosan, or starch edible films. Essential oils were characterized by gas chromatography-mass spectrometry (GC/MS) analysis. Amaranth, chitosan and starch edible films were formulated with essential oil concentrations of 0.00, 0.25, 0.50, 0.75, 1.00, 2.00, or 4.00%. Antifungal activity was evaluated by determining the mold radial growth on agar media inoculated with A. niger and P. digitatum after exposure to vapors arising from essential oils added to amaranth, chitosan or starch films using the inverted lid technique. The modified Gompertz model adequately described mold growth curves (mean coefficient of determination 0.991 ± 0.05). Chitosan films exhibited better antifungal effectiveness (inhibition of A. niger with 0.25% of Mexican oregano and cinnamon EO; inhibition of P. digitatum with 0.50% EOs) than amaranth films (2.00 and 4.00% of cinnamon and Mexican oregano EO were needed to inhibit the studied molds, respectively). For chitosan and amaranth films a significant increase (p<0.05) of lag phase was observed among film concentrations while a significant decrease (p<0.05) of maximum specific growth was determined. Chitosan edible films incorporating Mexican oregano or cinnamon essential oil could improve the quality of foods by the action of the volatile compounds on surface growth

  11. 77 FR 3587 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-25

    ... new airworthiness directive (AD) for certain Model 767-200 and 767-300 series airplanes. This AD was... potential loss of several functions essential for safe flight. DATES: This AD is effective February 29, 2012...) Applicability This AD applies to The Boeing Company Model 767-200 and 767-300 series airplanes, certificated...

  12. CCiCap: Boeing

    NASA Video Gallery

    NASA announced today its plans to partner with The Boeing Company for the next phase of the agency's Commercial Crew Program (CCP). Called Commercial Crew integrated Capability (CCiCap), the initia...

  13. 76 FR 18022 - Airworthiness Directives; The Boeing Company Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-01

    ... Model DC-9-14, DC-9- 15, and DC-9-15F Airplanes; and DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series..., Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT...) This AD applies to The Boeing Company Model DC-9-14, DC-9- 15, DC-9-15F, DC-9-21, DC-9-31,......

  14. 76 FR 39251 - Airworthiness Directives; The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-06

    ... Model DC-9-81 (MD- 81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 Airplanes AGENCY... Jersey Avenue, SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Roger Durbin, Aerospace.... Applicability (c) This AD applies to all The Boeing Company Model DC-9-81 (MD- 81), DC-9-82 (MD-82), DC-9-83...

  15. 77 FR 21429 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-10

    ... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777 airplanes. This AD was... these airplanes. DATES: This AD is effective May 15, 2012. The Director of the Federal Register...

  16. 77 FR 47330 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-08

    ... to supersede an existing airworthiness directive (AD) that applies to certain The Boeing Company Model 767-200, -300, -300F, and - 400ER series airplanes. The proposed AD would have continued to... installed, and related investigative and corrective actions if necessary. That proposed AD would have...

  17. Boeing F3B-1

    NASA Technical Reports Server (NTRS)

    1930-01-01

    Boeing F3B-1: While most Boeing F3B-1s served aboard the U. S. Navy aircraft carriers Lexington and Saratoga, this example flew in NACA hands at the Langley Memorial Aeronautical Laboratory in the late 1920's. Also known as the Boeing Model 77, the aircraft was powered by a Pratt & Whitney Wasp radial engine.

  18. 78 FR 65185 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-31

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 727 airplanes. This AD...

  19. COIL technology development at Boeing

    NASA Astrophysics Data System (ADS)

    Hurlock, Steve C.

    2002-05-01

    The historical COIL contributions at the McDonnell Douglas Research Laboratory, the Rocketdyne Division of Rockwell International and Boeing's Laser and Electro-Optic Systems organization are briefly described. The latter organization now contains the capabilities of the two heritage organizations. Boeing's new high pressure sealed COIL is also described.

  20. 78 FR 57542 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-19

    ... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM... Boeing Company Model 777-200 and -300 series airplanes. AD 2012-12-08 requires an inspection for the part... determined that additional airplanes may be subject to the identified unsafe condition. This proposed...

  1. 77 FR 5996 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-07

    ... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a... series airplanes. This AD was prompted by a report from the airplane manufacturer that airplanes were assembled with air distribution ducts in the environmental control system (ECS) wrapped with Boeing...

  2. 78 FR 20229 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-04

    ... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are..., -800, -900, and -900ER series airplanes. That AD currently requires repetitive inspections of the aft... Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle,...

  3. 78 FR 59304 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-26

    ... plastic tie straps, and inspecting for and repairing damaged wire bundles. We are proposing this AD to... each metal clamp with a plastic tie strap. While Boeing Service Bulletin 737-21-1186, dated April 17.... If any metal clamp is found installed, before further flight, replace each metal clamp with a...

  4. 76 FR 76066 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-06

    ... certain The Boeing Company Model 777 airplanes. This proposed AD was prompted by reports of corrosion... pins with new or reworked pivot pins having improved corrosion resistance, doing repetitive inspections... received reports of corrosion damage on the outer diameter chrome surface of the horizontal...

  5. 78 FR 38608 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-27

    ... result in uncontrolled decompression. DATES: We must receive comments on this proposed AD by August 12... result in uncontrolled decompression. Relevant Service Information We reviewed Boeing Alert Service... unsafe condition described previously is likely to exist or develop in other products of the same...

  6. 78 FR 40050 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-03

    ... reports of skin wear damage on airplanes on which Boeing Material Specifications (BMS) 10-86 Teflon-filled... ] inspection interval specified in AD 2009-14-02. The wear occurred through both the Teflon filled coating and... per 10-86 Teflon-filled coating per hour = $680 cycle. inspection cycles. [retained actions...

  7. 78 FR 31389 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-24

    ... ``New Inspections and Corrective Actions to Ensure Cross Beam Reinforcement,'' and suggested language... door. Boeing added that the current language in the NPRM and this service information leave open the..., and (4) Will not have a significant economic impact, positive or negative, on a substantial number...

  8. 77 FR 36206 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-18

    ..., -200LR, -300, and -300ER series airplanes. This proposed AD was prompted by reports of in-service events related to electrical power system malfunctions resulting in damage to electrical load management system... Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65,...

  9. 77 FR 10411 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-22

    ... to sustain limit flight and pressure loads. DATES: We must receive comments on this proposed AD by... pressure loads. Relevant Service Information We reviewed Boeing Alert Service Bulletin 777-53A0043, dated.... operators Inspections for Group 1 126 work-hours x $0 $10,710 per $267,750 per inspection cycle....

  10. 78 FR 21576 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-11

    ...). SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 757...: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 206- 544... invite you to send any written relevant data, views, or arguments about this proposal. Send your...

  11. 77 FR 54850 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-06

    ..., inspecting certain fasteners in the fuel tanks and determining the method of attachment of the vortex... of attachment of the vortex generators, and corrective action if necessary. That AD resulted from... inspecting the vortex generator attachment. Boeing has since revised this service bulletin. We have...

  12. 75 FR 38001 - Airworthiness Directives; The Boeing Company Model 747 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-01

    ...-073-AD; Amendment 39-16352; AD 2010-14-07] RIN 2120-AA64 Airworthiness Directives; The Boeing Company...). ACTION: Final rule. SUMMARY: The FAA is superseding an existing airworthiness directive (AD), which applies to certain Model 747 airplanes. That AD currently requires repetitive inspections of the...

  13. Will Boeing Change Health Care?

    PubMed

    Stempniak, Marty

    2015-12-01

    Big employers like Boeing and Intel are directly contracting with hospitals in an effort to control health care prices. Some hospital CEOs see direct contracting as the future, while others wonder how they can participate.

  14. Boeing flight deck design philosophy

    NASA Technical Reports Server (NTRS)

    Stoll, Harty

    1990-01-01

    Information relative to Boeing flight deck design philosophy is given in viewgraph form. Flight deck design rules, design considerations, functions allocated to the crew, redundancy and automation concerns, and examples of accident data that were reviewed are listed.

  15. 76 FR 1979 - Airworthiness Directives; The Boeing Company Model 757 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-12

    ... certification basis of the airplane, and the approval must specifically refer to this AD. Material Incorporated...-16576; AD 2011-02-03] RIN 2120-AA64 Airworthiness Directives; The Boeing Company Model 757 Airplanes... -300 series airplanes. This AD requires an inspection of the two spring arms in the spin...

  16. Barotrauma in Boeing 737 cabin crew.

    PubMed

    Kortschot, H W; Oosterveld, W J

    1993-01-01

    Several aircrew members of a Boeing 737 aircraft were referred to our department because they suffered from a barotrauma. The fast rate of pressure change during the descent of a Boeing 737 aircraft, as compared to the Boeing 747, DC-10 and Airbus 310 aircrafts, is most likely the cause of the development of the barotraumata.

  17. Boeing F4B-4

    NASA Technical Reports Server (NTRS)

    1932-01-01

    The Boeing F4B-4 was seen to differ from earlier F4Bs in having a vertical fin with slightly more area. The Boeing model 235 was not fitted with a NACA cowling, but rather the less efficient 'Townend' ring around the Pratt & Whitney Wasp radials cylinders. This aircraft was much used by both the Navy and the Army Air Corps in the late 1920's and early 1930's. The Army variation was known as the P-12E. The engine cowling was a British development known as the 'Townend' ring. It differed from the NACA cowling and was less effective in reducing the drag.

  18. 78 FR 65193 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-31

    .... FOR FURTHER INFORMATION CONTACT: Suzanne Lucier, Aerospace Engineer, Propulsion Branch, ANM-140S, FAA... more information about this AD, contact Suzanne Lucier, Aerospace Engineer, Propulsion Branch,...

  19. 77 FR 40832 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-11

    ... the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Ana Martinez Hueto, Aerospace... this AD, Ana Martinez Hueto, Aerospace Engineer, Cabin Safety and Environmental Systems Branch,...

  20. 76 FR 62661 - Airworthiness Directives; The Boeing Company Model 767-200 and -300 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-11

    ... Model 767-200 and - 300 Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION... certain Model 767-200 and 767-300 series airplanes. This proposed AD would require installing cargo... (b) None. Applicability (c) This AD applies to The Boeing Company Model 767-200 and 767- 300...

  1. 75 FR 15357 - Airworthiness Directives; The Boeing Company Model 767 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-29

    ... airplanes. This proposed AD would require repetitive inspections to detect fatigue cracking in the upper... this AD to detect and correct fatigue cracking in the upper wing skin at the fastener holes common to... October 28, 1999. Further Boeing analysis has determined the cracks to be a result of fatigue due...

  2. 75 FR 25124 - Airworthiness Directives; The Boeing Company Model 737-200, -300, -400, and -500 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-07

    ... Model 737-200, -300, -400, and -500 Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT... (AD) for certain Model 737-200, -300, -400, and -500 series airplanes. This proposed AD would require...) None. Applicability (c) This AD applies to The Boeing Company Model 737-200, -300, - 400, and...

  3. 75 FR 17889 - Airworthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and -300ER Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-08

    ... Model 777-200, - 200LR, -300, and -300ER Series Airplanes AGENCY: Federal Aviation Administration (FAA... directive (AD) for certain Model 777-200, -200LR, -300, and -300ER series airplanes. This proposed AD would...) This AD applies to The Boeing Company Model 777-200, -200LR, -300, and -300ER series...

  4. 76 FR 10288 - Airworthiness Directives; The Boeing Company Model 767-200, -300, -300F, and -400ER Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-24

    ... Model 767-200, -300, -300F, and -400ER Series Airplanes AGENCY: Federal Aviation Administration (FAA... airworthiness directive (AD) that applies to The Boeing Company Model 767-200, -300, and -300F series airplanes..., October 5, 2005), for certain Model 767-200, -300, and -300F series airplanes. That AD...

  5. Advanced Optical A/D Converter

    DTIC Science & Technology

    1993-05-01

    before the receiver and separately by reducing the gain in the EDFA . It is important to note that the optical power level was varied while all the...could not exceed roughly 50% of the maximum power available at full gain from the EDFA . 4.2 Baseband-Mode Testing The single-channel system was also...AD-A275 663 Advanced Optical A/D Convert M.C. Hamilton, J.A. Bell, D.A. Leep, J.P. Lin The Boeing Company Boeing Defense and Space Group P.O. Box

  6. Transonic CFD applications at Boeing

    NASA Technical Reports Server (NTRS)

    Tinoco, E. N.

    1989-01-01

    The use of computational methods for three dimensional transonic flow design and analysis at the Boeing Company is presented. A range of computational tools consisting of production tools for every day use by project engineers, expert user tools for special applications by computational researchers, and an emerging tool which may see considerable use in the near future are described. These methods include full potential and Euler solvers, some coupled to three dimensional boundary layer analysis methods, for transonic flow analysis about nacelle, wing-body, wing-body-strut-nacelle, and complete aircraft configurations. As the examples presented show, such a toolbox of codes is necessary for the variety of applications typical of an industrial environment. Such a toolbox of codes makes possible aerodynamic advances not previously achievable in a timely manner, if at all.

  7. Engineering--A Career for 330 Women at Boeing

    ERIC Educational Resources Information Center

    Minor, Barbara

    1974-01-01

    Describes the efforts of the Boeing Company to encourage and hire women for engineering jobs. Much of the article is devoted to women employed by Boeing in engineering jobs and their comments about engineering as a career for women. (BR)

  8. 77 FR 40828 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-11

    ... available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Nenita Odesa, Aerospace... Boulevard, Lakewood, CA 90712-4137; phone: (562) 627-5234; fax: (562) 627-5210; email: nenita.odesa@faa.gov... Information (1) For more information about this AD, contact Nenita Odesa, Aerospace Engineer, Airframe...

  9. 77 FR 65803 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-31

    ... Jersey Avenue SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Roger Durbin, Airframe Branch..., California 90712-4137; phone: (562) 627- 5233; fax: (562) 627-5210; email: roger.durbin@faa.gov... AD. (k) Related Information For more information about this AD, contact Roger Durbin, Airframe...

  10. 77 FR 55773 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-11

    ... receipt. FOR FURTHER INFORMATION CONTACT: Roger Durbin, Aerospace Engineer, Airframe Branch, ANM-120L, FAA...: (562) 627-5233; fax: (562) 627-5210; email: roger.durbin@faa.gov . SUPPLEMENTARY INFORMATION: Comments... this AD. (m) Related Information (1) For more information about this AD, contact Roger...

  11. 77 FR 71723 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-04

    ... Boeing Service Bulletin 737-52-1079. Or, (2) Those airplanes on which the door assembly having P/N 65... cargo door, in accordance with Boeing Service Bulletin 737-52-1079, Revision 5, dated May 16, 1996... frame and the cross beams of the aft cargo door, in accordance with Boeing Service Bulletin...

  12. 78 FR 47549 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-06

    ... been modified as specified in Boeing Service Bulletin 737-52-1079. Or, (2) Those airplanes on which the... cross beams of the aft cargo door, in accordance with Boeing Service Bulletin 737-52-1079, Revision 5... Bulletin 737-52-1079, Revision 5, dated May 16, 1996; Boeing Alert Service Bulletin 737-52A1079, Revision...

  13. 76 FR 62667 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-11

    ... airplanes. This proposed AD was prompted by reports of water leaking into electrical and electronic... sealing and taping the floor panels. We are proposing this AD to correct the unsafe condition on these... substantive verbal contact we receive about this proposed AD. Discussion We have received reports of...

  14. Parametric Evaluation of Absorption Losses and Comparison of Numerical Results to Boeing 707 Aircraft Experimental HIRF Results

    NASA Astrophysics Data System (ADS)

    Kitaygorsky, J.; Amburgey, C.; Elliott, J. R.; Fisher, R.; Perala, R. A.

    A broadband (100 MHz-1.2 GHz) plane wave electric field source was used to evaluate electric field penetration inside a simplified Boeing 707 aircraft model with a finite-difference time-domain (FDTD) method using EMA3D. The role of absorption losses inside the simplified aircraft was investigated. It was found that, in this frequency range, none of the cavities inside the Boeing 707 model are truly reverberant when frequency stirring is applied, and a purely statistical electromagnetics approach cannot be used to predict or analyze the field penetration or shielding effectiveness (SE). Thus it was our goal to attempt to understand the nature of losses in such a quasi-statistical environment by adding various numbers of absorbing objects inside the simplified aircraft and evaluating the SE, decay-time constant τ, and quality factor Q. We then compare our numerical results with experimental results obtained by D. Mark Johnson et al. on a decommissioned Boeing 707 aircraft.

  15. Advanced composite stabilizer for Boeing 737 aircraft

    NASA Technical Reports Server (NTRS)

    1978-01-01

    Activities related to development of an advanced composites stabilizer for the Boeing 737 commercial transport are reported. Activities include discussion of criteria and objectives, design loads, the fatigue spectrum definition to be used for all spectrum fatigue testing, fatigue analysis, manufacturing producibility studies, the ancillary test program, quality assurance, and manufacturing development.

  16. Commercial Crew Program: Boeing Breakout Video

    NASA Video Gallery

    NASA and The Boeing Company of Houston signed a funded Space Act Agreement (SAA) in March 2011 for the company’s CST-100. Under the $92.3 million agreement, NASA’s Commercial Crew Program (...

  17. 75 FR 10669 - Airworthiness Directives; The Boeing Company Model 747-100, 747-200B, 747-300, and 747SR Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-09

    ... Model 747-100, 747- 200B, 747-300, and 747SR Series Airplanes AGENCY: Federal Aviation Administration... Model 747-100, 747-200B, 747-300, and 747SR series airplanes. This AD requires installation of a... airworthiness directive (AD) that would apply to certain Boeing Model 747-100, 747-200B, 747-300, and...

  18. Technology transfer personnel exchange at the Boeing Company

    SciTech Connect

    Antoniak, Z.I.

    1993-03-01

    The objective of the exchange was to transfer Pacific Northwest Laboratory (PNL) technology and expertise in advanced ceramic fabric composites (ACFC) to the Boeing Defense Space Group (Boeing Aerospace). Boeing Aerospace was especially interested in applying PNL-developed ACFC technology to its current and future spacecraft and space missions. Boeing has on-going independent research and development (R D) programs on advanced radiators and heat pipes, therefore, PNL research in ceramic fabric heat pipes was of particular interest to Boeing. Thus, this exchange assisted in the transfer of PNL's ACFC heat pipe technology and other, related research capabilities to private industrial application. The project was proposed as an initial step in building a long-term collaborative relationship between Boeing and PNL that may result in future Cooperative Research and Development Agreements (CRADAs) and/or other types of collaborative efforts.

  19. Technology transfer personnel exchange at the Boeing Company

    SciTech Connect

    Antoniak, Z.I.

    1993-03-01

    The objective of the exchange was to transfer Pacific Northwest Laboratory (PNL) technology and expertise in advanced ceramic fabric composites (ACFC) to the Boeing Defense & Space Group (Boeing Aerospace). Boeing Aerospace was especially interested in applying PNL-developed ACFC technology to its current and future spacecraft and space missions. Boeing has on-going independent research and development (R&D) programs on advanced radiators and heat pipes, therefore, PNL research in ceramic fabric heat pipes was of particular interest to Boeing. Thus, this exchange assisted in the transfer of PNL`s ACFC heat pipe technology and other, related research capabilities to private industrial application. The project was proposed as an initial step in building a long-term collaborative relationship between Boeing and PNL that may result in future Cooperative Research and Development Agreements (CRADAs) and/or other types of collaborative efforts.

  20. 78 FR 65166 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-31

    ... Jersey Avenue SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Nathan Weigand, Aerospace..., describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail... information about this AD, contact Nathan Weigand, Aerospace Engineer, Airframe Branch, ANM-120S, FAA,...

  1. 78 FR 73739 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-09

    ... CONTACT: Roger Durbin, Airframe Branch, ANM- 120L, FAA, Los Angeles Aircraft Certification Office (ACO...; email: roger.durbin@faa.gov . SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send any... more information about this AD, contact Roger Durbin, Airframe Branch, ANM-120L, FAA, Los...

  2. 77 FR 65611 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-30

    .... FOR FURTHER INFORMATION CONTACT: Roger Durbin, Airframe Branch, ANM- 120L, FAA, Los Angeles Aircraft...; fax: (562) 627-5210; email: roger.durbin@faa.gov . SUPPLEMENTARY INFORMATION: Discussion We issued a... about this AD, contact Roger Durbin, Airframe Branch, ANM-120L, FAA, Los Angeles Aircraft...

  3. Boeing's High Voltage Solar Tile Test Results

    NASA Technical Reports Server (NTRS)

    Reed, Brian J.; Harden, David E.; Ferguson, Dale C.; Snyder, David B.

    2002-01-01

    Real concerns of spacecraft charging and experience with solar array augmented electrostatic discharge arcs on spacecraft have minimized the use of high voltages on large solar arrays despite numerous vehicle system mass and efficiency advantages. Boeing's solar tile (patent pending) allows high voltage to be generated at the array without the mass and efficiency losses of electronic conversion. Direct drive electric propulsion and higher power payloads (lower spacecraft weight) will benefit from this design. As future power demand grows, spacecraft designers must use higher voltage to minimize transmission loss and power cable mass for very large area arrays. This paper will describe the design and discuss the successful test of Boeing's 500-Volt Solar Tile in NASA Glenn's Tenney chamber in the Space Plasma Interaction Facility. The work was sponsored by NASA's Space Solar Power Exploratory Research and Technology (SERT) Program and will result in updated high voltage solar array design guidelines being published.

  4. Potential for Sonic Boom Reduction of the Boeing HSCT

    NASA Technical Reports Server (NTRS)

    Haglund, George T.

    1999-01-01

    The HSR sonic boom technology program includes a goal of reducing the objectionable aspects of sonic boom. Earlier HSCT sonic boom studies considered achieving significant sonic boom reduction by the use of arrow-wing planforms and detailed shaping of the airplane to produce shaped waveforms (non N-waves) at the ground. While these design efforts were largely successful, the added risk and cost of the airplanes were judged to be unacceptable. The objective of the current work is to explore smaller configuration refinements that could lead to reduced sonic boom impact, within design and operational constraints. A somewhat modest target of 10% reduction in sonic boom maximum overpressure was selected to minimize the effect on the configuration performance. This work was a joint NASA/Industry effort, utilizing the respective strengths of team members at Boeing, NASA Langley, and NASA Ames. The approach used was to first explore a wide range of modifications and airplane characteristics for their effects on sonic boom and drag, using classical Modified Linear Theory (MLT) methods. CFD methods were then used to verify promising, modifications and to analyze modifications for which the MLT methods were not appropriate. The tea m produced a list of configuration changes with their effects on sonic boom and, in some cases, an estimate of the drag penalty. The most promising modifications were applied to produce a boom-softened derivative of the baseline Boeing High Speed Civil Transport (HSCT) configuration. This boom-softened configuration was analyzed in detail for the reduce sonic boom impact and also for the effect of the configuration modifications on drag, weight, and overall performance relative to the baseline.

  5. 77 FR 37831 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-25

    ... report summarizing each substantive verbal contact we receive about this proposed AD. Discussion We... statement would serve as direct communication to maintenance personnel that there is an AD associated with... Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate...

  6. 78 FR 14719 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-07

    ... skin just above certain lap splice locations is subject to widespread fatigue damage (WFD). This... locations, and repair if necessary. We are proposing this AD to detect and correct fatigue cracking of the... substantive verbal contact we receive about this proposed AD. Discussion Structural fatigue damage...

  7. Boeing XF2B-1 (F2B-1)

    NASA Technical Reports Server (NTRS)

    1931-01-01

    Boeing XF2B-1 (F2B-1): Serving as the prototype for the F2B-1 shipboard fighter, the XF2B-1 differed visually in having a pointed spinner and an unbalanced rudder. Like many aircraft of its day, the Boeing model 69 was powered by a Pratt & Whitney Wasp radial engine.

  8. 77 FR 7521 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-13

    ... report of a rudder hard-over event on a Model 747-400 series airplane, caused by a rudder power control... condition could result in a hard-over of the rudder surface leading to an increase in pilot workload and a... surface hard-over. Boeing pointed out that the secondary retention device incorporated in Boeing...

  9. 75 FR 38007 - Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-01

    ..., and 747SP Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule... SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400F, 747SR, and 747SP series airplanes. This...). This AD results from reports of duct assemblies in the ECS with burned Boeing Material...

  10. 75 FR 18446 - Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-12

    ..., and 747SP Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of..., and 747SP series airplanes. This proposed AD would require reworking or replacing certain duct... assemblies in the ECS with burned Boeing Material Specification (BMS) 8-39 polyurethane foam insulation....

  11. 75 FR 61337 - Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-05

    ... Li, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 1601... required by this AD to the Boeing Commercial Airplanes ODA rather than a Designated Engineering... Li, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office,...

  12. 76 FR 52899 - Airworthiness Directives; The Boeing Company Model 767-200, -300, and -300F Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-24

    ... after receipt. FOR FURTHER INFORMATION CONTACT: Ana Martinez Hueto, Aerospace Engineer, Cabin Safety and... district office. Related Information (i) For more information about this AD, contact Ana Martinez...

  13. Final Technical Report. Project Boeing SGS

    SciTech Connect

    Bell, Thomas E.

    2014-12-31

    Boeing and its partner, PJM Interconnection, teamed to bring advanced “defense-grade” technologies for cyber security to the US regional power grid through demonstration in PJM’s energy management environment. Under this cooperative project with the Department of Energy, Boeing and PJM have developed and demonstrated a host of technologies specifically tailored to the needs of PJM and the electric sector as a whole. The team has demonstrated to the energy industry a combination of processes, techniques and technologies that have been successfully implemented in the commercial, defense, and intelligence communities to identify, mitigate and continuously monitor the cyber security of critical systems. Guided by the results of a Cyber Security Risk-Based Assessment completed in Phase I, the Boeing-PJM team has completed multiple iterations through the Phase II Development and Phase III Deployment phases. Multiple cyber security solutions have been completed across a variety of controls including: Application Security, Enhanced Malware Detection, Security Incident and Event Management (SIEM) Optimization, Continuous Vulnerability Monitoring, SCADA Monitoring/Intrusion Detection, Operational Resiliency, Cyber Range simulations and hands on cyber security personnel training. All of the developed and demonstrated solutions are suitable for replication across the electric sector and/or the energy sector as a whole. Benefits identified include; Improved malware and intrusion detection capability on critical SCADA networks including behavioral-based alerts resulting in improved zero-day threat protection; Improved Security Incident and Event Management system resulting in better threat visibility, thus increasing the likelihood of detecting a serious event; Improved malware detection and zero-day threat response capability; Improved ability to systematically evaluate and secure in house and vendor sourced software applications; Improved ability to continuously monitor

  14. 76 FR 52225 - Airworthiness Directives; The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-22

    ... Model DC-9-81 (MD- 81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 Airplanes AGENCY... Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590. FOR FURTHER INFORMATION... ADs (b) None. Applicability (c) This AD applies to The Boeing Company Model DC-9-81 (MD-81),...

  15. 78 FR 14734 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-07

    ... conclusively determines the serial number of the horizontal stabilizer. STC Winglet Comment Aviation Partners Boeing stated that the installation of winglets per Supplemental Type Certificate (STC) ST00830SE...

  16. 77 FR 31762 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-30

    ... Part Surface Inspection (Impedance Plane Display), of Part 6, Eddy Current, of the Boeing 707, 720... Subject 51-00-00 Figure 24, Steel Part Surface Inspection (Impedance Plane Display), of Part 6,...

  17. Boeing CST-100 Mock-Up Undergoes Airbag Stabilization Test

    NASA Video Gallery

    The Boeing Company's mock-up CST-100 spacecraft was put through water landing development tests Oct. 1-5, 2012, at Bigelow Aerospace's headquarters outside of Las Vegas. Engineers with Bigelow have...

  18. 78 FR 37497 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-21

    ... existing AD, which requires an inspection to determine if certain motor operated valve (MOV) actuators for... CONTACT: Rebel Nichols, Aerospace Engineer, Propulsion Branch, ANM-140S, FAA, Seattle Aircraft... electrical current to flow through certain MOV actuators into the fuel tank. The new MOV actuators...

  19. 77 FR 6692 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-09

    ... information identified in this proposed AD, contact Goodrich Corporation, Sensors and Integrated Systems, 100... Corporation, Sensors and Integrated Systems, 100 Panton Road, Vergennes, Vermont 05491; phone: 802-877-4580... airplane. (d) Subject Joint Aircraft System Component (JASC)/Air Transport Association (ATA) of...

  20. 78 FR 75512 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-12

    ... clamps that are not fully cushioned could allow electrical power wiring to come in contact with the exposed metal of the improper clamp, causing a short circuit and subsequent electrical arcing. This..., causing a short circuit and subsequent electrical arcing. We are proposing this AD to prevent...

  1. Technology Approach: DoD Versus Boeing (A Comparative Study)

    DTIC Science & Technology

    2016-01-01

    they may have affected development time for the C-17 and the Boeing 777. Boeing’s focus on cost, schedule, performance, and market competition is...serve its customers and protect its market share against competition for 50 years into the future. Boeing was also committed to changing and improving...Boeing’s focus during the design and acquisition process was on cost, schedule, performance, and market competition. DoD’s focus during the design and

  2. Boeing prepares AOA sensor for flight test on 767

    NASA Astrophysics Data System (ADS)

    Smith, Bruce A.

    1988-11-01

    The Airborne Optical Adjunct sensor, developed to evaluate the ability of aircraft-mounted longwave infrared systems to supplement ground-based radar in defense against ballistic missiles, is being tested at Boeing Aerospace prior to installation in the Boeing 767 aircraft for flight tests to evaluate the sensor's ability to track and detect missiles. The major objectives of the test program are summarized, and final computer changes are reviewed. The sensing operations involved in the tests are described.

  3. Advanced composite elevator for Boeing 727 aircraft

    NASA Technical Reports Server (NTRS)

    1979-01-01

    Detail design activities are reported for a program to develop an advanced composites elevator for the Boeing 727 commercial transport. Design activities include discussion of the full scale ground test and flight test activities, the ancillary test programs, sustaining efforts, weight status, and the production status. Prior to flight testing of the advanced composites elevator, ground, flight flutter, and stability and control test plans were reviewed and approved by the FAA. Both the ground test and the flight test were conducted according to the approved plan, and were witnessed by the FAA. Three and one half shipsets have now been fabricated without any significant difficulty being encountered. Two elevator system shipsets were weighed, and results validated the 26% predicted weight reduction. The program is on schedule.

  4. Water Injection Feasibility for Boeing 747 Aircraft

    NASA Technical Reports Server (NTRS)

    Daggett, David L.

    2005-01-01

    Can water injection be offered at a reasonable cost to large airplane operators to reduce takeoff NO( sub x) emissions? This study suggests it may be possible. This report is a contract deliverable to NASA Glenn Research Center from the prime contractor, The Boeing Commercial Airplane Company of Seattle, WA. This study was supported by a separate contract to the Pratt & Whitney Engine Company of Hartford, CT (contract number NNC04QB58P). Aviation continues to grow and with it, environmental pressures are increasing for airports that service commercial airplanes. The feasibility and performance of an emissions-reducing technology, water injection, was studied for a large commercial airplane (e.g., Boeing 747 with PW4062 engine). The primary use of the water-injection system would be to lower NOx emissions while an important secondary benefit might be to improve engine turbine life. A tradeoff exists between engine fuel efficiency and NOx emissions. As engines improve fuel efficiency, by increasing the overall pressure ratio of the engine s compressor, the resulting increased gas temperature usually results in higher NOx emissions. Low-NO(sub x) combustors have been developed for new airplanes to control the increases in NO(sub x) emissions associated with higher efficiency, higher pressure ratio engines. However, achieving a significant reduction of NO(sub x) emissions at airports has been challenging. Using water injection during takeoff has the potential to cut engine NO(sub x) emissions some 80 percent. This may eliminate operating limitations for airplanes flying into airports with emission constraints. This study suggests an important finding of being able to offer large commercial airplane owners an emission-reduction technology that may also save on operating costs.

  5. Contact dermatitis

    MedlinePlus

    Dermatitis - contact; Allergic dermatitis; Dermatitis - allergic; Irritant contact dermatitis; Skin rash - contact dermatitis ... There are 2 types of contact dermatitis. Irritant dermatitis: This ... can be by contact with acids, alkaline materials such as soaps ...

  6. 76 FR 13546 - Airworthiness Directives; The Boeing Company Model MD-90-30 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-14

    ... the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Roger Durbin, Aerospace Engineer...-5233; fax: 562-627-5210; e- mail: Roger.Durbin@faa.gov . SUPPLEMENTARY INFORMATION: Comments Invited We... about this AD, contact Roger Durbin, Aerospace Engineer, Airframe Branch, ANM-120L, Los Angeles...

  7. 77 FR 1618 - Special Conditions: The Boeing Company, Model 767-300; Seats With Inflatable Lapbelts

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-11

    ... Federal Aviation Administration 14 CFR Part 25 Special Conditions: The Boeing Company, Model 767-300... conditions; request for comments. SUMMARY: These special conditions are issued for the Boeing Model 767- 300... for the installation of inflatable lapbelts on ] Boeing Model 767-300 series airplanes. The Model...

  8. Hairy AdS solitons

    NASA Astrophysics Data System (ADS)

    Anabalón, Andrés; Astefanesei, Dumitru; Choque, David

    2016-11-01

    We construct exact hairy AdS soliton solutions in Einstein-dilaton gravity theory. We examine their thermodynamic properties and discuss the role of these solutions for the existence of first order phase transitions for hairy black holes. The negative energy density associated to hairy AdS solitons can be interpreted as the Casimir energy that is generated in the dual filed theory when the fermions are antiperiodic on the compact coordinate.

  9. 76 FR 53346 - Airworthiness Directives; The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-26

    ... Model DC-9-81 (MD- 81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 Airplanes AGENCY... Jersey Avenue, SE., Washington, DC 20590. Hand Delivery: Deliver to Mail address above between 9 a.m. and...) This AD applies to The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83),...

  10. 76 FR 1993 - Airworthiness Directives; The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-12

    ... Model DC-9-81 (MD- 81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 Airplanes AGENCY... Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590. FOR FURTHER INFORMATION.... Applicability (c) This AD applies to The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83...

  11. 76 FR 41651 - Airworthiness Directives; The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-15

    ... Model DC-9-81 (MD- 81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 Airplanes AGENCY... Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590. FOR FURTHER INFORMATION...) This AD applies to The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83),...

  12. Added Sugars

    MedlinePlus

    ... need sugar to function properly. Added sugars contribute zero nutrients but many added calories that can lead to extra pounds or even obesity, thereby reducing heart health. If you think of your daily calorie needs as a budget, you want to “spend” ...

  13. Value Added?

    ERIC Educational Resources Information Center

    UCLA IDEA, 2012

    2012-01-01

    Value added measures (VAM) uses changes in student test scores to determine how much "value" an individual teacher has "added" to student growth during the school year. Some policymakers, school districts, and educational advocates have applauded VAM as a straightforward measure of teacher effectiveness: the better a teacher,…

  14. Mission Analysis and Conceptual Design of a Space Ambulance Utilizing the Boeing X-37B Platform

    NASA Astrophysics Data System (ADS)

    Blaesser, Nathaniel James

    This paper discusses the concept of operations and modifications for a crew return vehicle from the International Space Station based on the Boeing X-37B platform. The modifications necessary include accommodating a three person crew, adding an environmental control and life support system and modifying the propulsion system to be more conducive to a fast evacuation. Two crew seating configurations were considered and traded for vehicle mass, crew envelope and ease of loading and unloading the injured patient. Computer models were generated to determine key parameters, and the models were validated using physical mock-ups. The mission is considerably shorter than the design reference mission, meaning that there are significant reductions in propellant mass and volume. The results showed that by utilizing the space saved from smaller propellant tanks, and combining the crew's oxygen supply with the propulsion system, the vehicle can be retooled without modifying the outer mold line..

  15. Model BOE Block Program for Rural Schools. Final Report.

    ERIC Educational Resources Information Center

    Spooner, Kendrick L.

    A one-year evaluation was conducted of the Exemplary Business and Office Education (BOE) Program as implemented in seven rural Colorado schools. The individualized program featured a two-period block core curriculum with three or more optional areas of study. Evaluation objectives were to describe the exemplary projects in light of the…

  16. 78 FR 21236 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-10

    ..., August 16, 2012) on Winglets Aviation Partners Boeing (APB) stated that it has reviewed the NPRM (77 FR... that the installation of winglets, per Supplemental Type Certificate (STC) ST01518SE, ``does not affect them.'' We infer that APB means the installation of these winglets does not affect accomplishing...

  17. The Boeing Company's Manufacturing Technology Student Internship. Evaluation Report.

    ERIC Educational Resources Information Center

    Owens, Thomas R.

    The Boeing Company contracted with the Northwest Regional Educational Laboratory to evaluate its student internship program, part of a "school-to-work" effort modeled after the nationally recognized Tech Prep initiative. The company's involvement in the Tech Prep Program has been implemented in three phases: (1) the initial phase helped…

  18. VIEW OF BOEING 737200 FUSELAGE FROM TOP LEVEL OF TAIL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF BOEING 737-200 FUSELAGE FROM TOP LEVEL OF TAIL DOCK AND. A NEW SAFETY CABLE FROM THE TAIL DOCK WILL ALLOW INSPECTORS TO WALK UP AND DOWN THE FUSELAGE TO CHECK FOR CRACKS OR MISSING FASTENERS. - Greater Buffalo International Airport, Maintenance Hangar, Buffalo, Erie County, NY

  19. 77 FR 61542 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-10

    ... flange of the inboard track at the rear spar attachment of each outboard flap, and eventual rework of the... the rear spar attachment of each outboard flap, and eventual rework of the flap track assembly and..., repair or rework the flap track per the ``Repair and Rework Instructions'' specified in Boeing AOM...

  20. 78 FR 33193 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-04

    ... hidden parts of the airplane. The FAA made this safety determination based on tests of aged BMS 8-39... (such as the installation of felt on Model 767 airplanes per Figure 18 of Boeing Special Attention... retardant properties, which deteriorate over time, can provide a fuel source for an ignition event in...

  1. 78 FR 25374 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-01

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2012-1073; Directorate Identifier 2012-NM...): 2013-08-13 The Boeing Company: Amendment 39-17430; Docket No. FAA- 2012-1073; Directorate...

  2. RIGHT ENGINE MAINTENANCE ON BOEING 737200. THE COWLING OF THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    RIGHT ENGINE MAINTENANCE ON BOEING 737-200. THE COWLING OF THE RIGHT ENGINE IS OPEN, AND THE CREW IS WORKING ON THE JACK SCREWS THAT REGULATE THE FLAPS. MECHANICS WILL CHANGE ALL FUEL AND OIL FILTERS AS WELL AS CHECKING CHIP DETECTORS FOR METAL PARTICLES THAT INDICATE BEARING FAILURE. - Greater Buffalo International Airport, Maintenance Hangar, Buffalo, Erie County, NY

  3. Boeing to Rank Colleges by Measuring Graduates' Job Success

    ERIC Educational Resources Information Center

    Basken, Paul

    2008-01-01

    Boeing Company, the Chicago-based aerospace giant, has spent the past year matching internal data from employee evaluations with information about the colleges its engineers attended. It has used that analysis to create a ranking system, which it plans to unveil in the coming month, that will show which colleges have produced the workers it…

  4. 78 FR 52875 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-27

    ... fillet radius of the rib chord, and a large repair or preventive modification if necessary... repetitive inspections for cracks along the upper fillet radius of the rib chord. Boeing Service Bulletin 727..., and do a detailed (close visual) inspection for cracking along the upper fillet radius of the...

  5. Feasibility study of the Boeing Small Research Module (BSRM) concept

    NASA Technical Reports Server (NTRS)

    1975-01-01

    The design, capabilities, and subsystem options are described for the Boeing Small Research Module (BSRM). Specific scientific missions are defined and the BSRM capability to support these missions is discussed. Launch vehicle integration requirements and spacecraft operational features are also presented.

  6. Chromate-free Exterior Painting for Boeing Commercial Aircraft

    DTIC Science & Technology

    2009-09-01

    vinegar odor pH 4 after mixed Apply with no rinse ASETSDefense2009_JHO.ppt | 8 Engineering, Operations & Technology | Boeing Research...Conventional Boegel EP-II/AC-131-CB Health & Safety Contains Hexavalent chromium pH = 2.1 No Hexavalent chromium pH = 4 Environmental Impact Volume of

  7. 77 FR 64711 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-23

    ... Nesemeier, Senior Aerospace Engineer, Systems and Equipment Branch, ANM-130S, FAA, Seattle Aircraft... on the SNPRM (77 FR 31758, May 30, 2012) and the FAA's response to each comment. Support for the SNPRM (77 FR 31758, May 30, 2012) Boeing supports the SNPRM (77 FR 31758, May 30, 2012). Requests To...

  8. 77 FR 36139 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-18

    ... significant economic impact, positive or negative, on a substantial number of small entities under the... current inspections for cracking of the frame, HFEC inspections for cracking of the reinforcement angle..., and reinforcement angle, in accordance with the Accomplishment Instructions of Boeing Alert...

  9. 78 FR 68693 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-15

    ... supplemental type certificate (STC) ST00830SE ( http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0... track bolt and splice part kits when frame replacements are required. The commenter stated that Boeing... found missing from the structure during the accomplishment of the tasks required by paragraph (g)...

  10. 77 FR 41934 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-17

    ... loss of boost pump pressure of the fuel feed system, followed by loss of fuel system suction feed..., which in the event of total loss of the fuel boost pumps could result in dual engine flameout, inability... previous NPRM during maintenance operations. Relevant Service Information We reviewed Boeing Alert...

  11. 78 FR 73460 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-06

    ... driven pump (ADP) turbine gearbox assembly (TGA), which resulted in the release of high energy fragments... striking passengers, or penetrating the wing-to-body fairing and striking ground handling or maintenance... maintenance personnel, causing serious injury. Relevant Service Information We reviewed Boeing...

  12. 77 FR 39188 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-02

    ... number 989. CAL stated that, in the Boeing 767 Airplane Maintenance Manual there are two fuel pump wire... sleeves of the fuel tank boost pumps and override/jettison pumps; replacement of the sleeves with new... proposing this supplemental NPRM to detect and correct chafing of the fuel pump wire insulation...

  13. 77 FR 3579 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-25

    ... proximity switch, and testing to ensure positive door locking and corrective action if necessary. For... assembly, relocating and adjusting the sensor target and the sensor proximity switch, and testing to ensure... switch on the new bracket in accordance with the Accomplishment Instructions of Boeing Service...

  14. 78 FR 27310 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-10

    ...-essential electrical systems through a switch in the flight compartment in the event of smoke or flames. In... the passenger cabin, a switch is needed in the flight compartment to enable the flightcrew to turn off... utility bus switch; and doing other specified actions. For the Boeing Company Model 737-300, -400,...

  15. Technology Approach: DoD versus Boeing (A Comparative Study)

    DTIC Science & Technology

    1995-01-01

    John Newhouse points out in his book, The Sporty Game, “...there is more technology in the wing than in any other part of an airframe...production...Defense. Nelson, E. (1994, May). Boeing Gets Air- lines on Board. Business Marketing. Newhouse, J. (1982). The Sporty Game. New York: Alfred A. Knopf

  16. 77 FR 52212 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-29

    ... Delta requested that the exceptions to certain compliance times in paragraph (p)(2) of the NPRM (76 FR..., 2011) and the FAA's response to each comment. Request To Add Compliance Time for Group 2 Airplanes... a 90-day compliance time for airplanes in Group 2. The commenter stated that Boeing...

  17. Feasibility study of the Boeing Small Research Module (BSRM) concept

    NASA Technical Reports Server (NTRS)

    1975-01-01

    The design, capabilities, and subsystem options for the Boeing Small Research Module (BSRM) are described. Specific scientific missions are defined based on NASA-Ames Research Center requirements and the BSRM capability to support these missions is discussed. Launch vehicle integration requirements and spacecraft operational features are also presented.

  18. Adding Value.

    ERIC Educational Resources Information Center

    Orsini, Larry L.; Hudack, Lawrence R.; Zekan, Donald L.

    1999-01-01

    The value-added statement (VAS), relatively unknown in the United States, is used in financial reports by many European companies. Saint Bonaventure University (New York) has adapted a VAS to make it appropriate for not-for-profit universities by identifying stakeholder groups (students, faculty, administrators/support personnel, creditors, the…

  19. 75 FR 64633 - Airworthiness Directives; The Boeing Company Model 767-200, -300, and -300F Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-20

    ... also post a report summarizing each substantive verbal contact we receive about this AD. Costs of Compliance We estimate that this AD affects 354 airplanes of U.S. registry. This new AD adds no new costs to affected operators. The current costs for this AD are repeated for the convenience of affected...

  20. 76 FR 78138 - Airworthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and -300ER Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-16

    ... substantive verbal contact we receive about this AD. Costs of Compliance We estimate that this AD affects 129 airplanes of U.S. registry. This new AD adds no additional economic burden. The current costs for this AD are repeated for the convenience of affected operators, as follows: Estimated Costs Cost on...

  1. 76 FR 35342 - Airworthiness Directives; The Boeing Company Model MD-90-30 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-17

    ...., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Roger Durbin, Aerospace Engineer, Airframe Branch, ANM...-5210; e- mail: Roger.Durbin@faa.gov . SUPPLEMENTARY INFORMATION: Discussion We issued a notice of... about this AD, contact Roger Durbin, Aerospace Engineer, Airframe Branch, ANM-120L, Los Angeles...

  2. Status of the Boeing Dish Engine Critical Component Project

    SciTech Connect

    Brau, H.W.; Diver, R.B.; Nelving, H.; Stone, K.W.

    1999-01-08

    The Boeing Company's Dish Engine Critical Component (DECC) project started in April of 1998. It is a continuation of a solar energy program started by McDonnell Douglas (now Boeing) and United Stirling of Sweden in the mid 1980s. The overall objectives, schedule, and status of this project are presented in this paper. The hardware test configuration, hardware background, operation, and test plans are also discussed. A summary is given of the test data, which includes the daily power performance, generated energy, working-gas usage, mirror reflectivity, solar insolation, on-sun track time, generating time, and system availability. The system performance based upon the present test data is compared to test data from the 1984/88 McDonnell Douglas/United Stirling AB/Southem California Edison test program. The test data shows that the present power, energy, and mirror performance is comparable to when the hardware was first manufactured 14 years ago.

  3. Status of the Boeing Dish Engine Critical Component project

    SciTech Connect

    Stone, K.W.; Nelving, H.; Braun, H.W.; Clark, T.B.; Diver, R.B.

    1999-07-01

    The Boeing Company's Dish Engine Critical Component (DECC) project started in April of 1998. It is a continuation of a solar energy program started by McDonnel Douglas (now Boeing) and United Stirling of Sweden in the mid 1980s. The overall objectives, schedule, and status of this project are presented in this paper. The hardware test configuration, hardware background, operation, and test plans are also discussed. A summary is given of the test data, which includes the daily power performance, generated energy, working-gas usage, mirror reflectivity, solar insolation, on-sun track time. Generating time, and system availability. The system performance based upon the present test data is compared to test data from the 1984/88 McDonnel Douglas/United Stirling AB/Southern California Edison test program. The test data shows that the present power, energy, and mirror performance is comparable to when the hardware was first manufactured 14 years ago.

  4. Nde Challenges with Future Commercial Aircraft-A Boeing Perspective

    NASA Astrophysics Data System (ADS)

    Kollgaard, J. R.; LaRiviere, S. G.

    2008-02-01

    Commercial aircraft have undergone revolutionary changes in design, configuration and materials. This produces new challenges to the NDE community ranging from process controls of raw materials, to testing and fabrication of structural components, to service damage assessments. As we drive NDE up the value stream, it will become imperative to understand variousprocess parameters and their relationship to product quality. NDE may play a key role in characterizing and controlling those parameters. In production, inspection has become a critical aspect in the processing of large, unitized structures. Penetrant, radiographic, and magnetic particle techniques are less applicable while ultrasonics has taken on a critical role, earlier in the build process. NDE data are acquired over large areas at rates far faster than before, creating challenges in the time required to analyze and document the data. Qualified inspectors, equipment, and techniques are essential. In the field, eddy current and shear wave ultrasonic methods, long a mainstay of aircraft maintenance, are beginning to yield to ultrasonic techniques involving C-scans and linear arrays. The building of new-generation airplanes has revealed shortcomings in existing NDE technology and in some cases enhanced the case for non-traditional methods. This paper will review Boeing's experience with NDE of advanced structures, in particular those present on the Boeing 787, and summarize the Boeing outlook for future NDE needs.

  5. Contact Dermatitis

    MedlinePlus

    ... Us Media contacts Advertising contacts AAD logo Advertising, marketing and sponsorships Legal notice Copyright © 2017 American Academy ... prohibited without prior written permission. AAD logo Advertising, marketing and sponsorships Legal notice Copyright © 2017 American Academy ...

  6. Telocyte's contacts.

    PubMed

    Faussone-Pellegrini, Maria-Simonetta; Gherghiceanu, Mihaela

    2016-07-01

    Telocytes (TC) are an interstitial cell type located in the connective tissue of many organs of humans and laboratory mammals. By means of homocellular contacts, TC build a scaffold whose meshes integrity and continuity are guaranteed by those contacts having a mechanical function; those contacts acting as sites of intercellular communication allow exchanging information and spreading signals. Heterocellular contacts between TC and a great variety of cell types give origin to mixed networks. TC, by means of all these types of contacts, their interaction with the extracellular matrix and their vicinity to nerve endings, are part of an integrated system playing tissue/organ-specific roles.

  7. 75 FR 59167 - Airworthiness Directives; The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-27

    ... 2 June 7, 2010. 737 78 1079. Boeing Service Bulletin 4 June 16, 2005. 737 78 1069. Boeing Service...-1079 describes procedures for essentially the same actions (including inspections and modification......... Optional action..... Optional action. (Boeing Service Bulletin 737-78- 1079) (if done as an option...

  8. 76 FR 426 - Airworthiness Directives; The Boeing Company Model 737-300, -400, and -500 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-05

    ... specified in paragraph 1.E., ``Compliance'' of Boeing Special Attention Service Bulletin 737-54- 1044, dated... Service Bulletin 737-54-1044, dated December 10, 2007; or Boeing Alert Service Bulletin 737-54A1044... inspection at the time specified in paragraph 1.E. of Boeing Special Attention Service Bulletin...

  9. 75 FR 57882 - Airworthiness Directives; The Boeing Company Model 737-300, -400, and -500 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-23

    ... those described in Boeing Special Attention Service Bulletin 737-54-1044, dated December 10, 2007... Service Bulletin 737-54- 1044, dated December 10, 2007; except, where the service bulletin specifies a... Instructions of Boeing Special Attention Service Bulletin 737-54-1044, dated December 10, 2007; or Boeing...

  10. 76 FR 15864 - Airworthiness Directives; The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-22

    .... Relevant Service Information We reviewed Boeing Special Attention Service Bulletin 737-78-1083, dated June... Information Appendix A of Boeing Special Attention Service Bulletin 737-78- 1083, dated June 30, 2010... Appendix A of Boeing Special Attention Service Bulletin 737-78-1083, dated June 30, 2010. Appendix A...

  11. 75 FR 22514 - Airworthiness Directives; The Boeing Company Model 747-200B Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-29

    ... Boeing to the stretched upper deck (SUD) configuration require inspection for cracking of the stringer 6... stretched upper deck (SUD) configuration require inspecting the stringer 6 lap joint upper fastener row for... results from reviews done by Boeing, which show that airplanes modified to the stretched upper deck...

  12. Impact evaluation of lighting retrofit projects at Boeing Commercial Airplane Group under The Energy $avings Plan

    SciTech Connect

    Sullivan, G.P.; Oens, M.A.; Spanner, G.E.

    1994-01-01

    This impact evaluation of two lighting retrofit projects that were recently installed at Boeing Commercial Airplane Group (Boeing) was conducted for the Bonneville Power Administration (Bonneville) as part of an evaluation of its Energy $avings Plan (E$P) Program. The first project was a light-fixture and lighting control retrofit, consisting of five individual measures installed in Building 40-05. The second project was a retrofit of all parking lot lighting on the site. The objective of this impact evaluation was to assess how much electrical energy is being saved at Boeing as a result of the E$P projects and to determine how much the savings cost Bonneville and the region. The impact of the project was evaluated with a combination of engineering analysis, financial analysis, interviews, and submittal reviews (Boeing`s proposals and completion reports).

  13. Boeing Low-Thrust Geosynchronous Transfer Mission Experience

    NASA Technical Reports Server (NTRS)

    Poole, Mark; Ho, Monte

    2007-01-01

    Since 2000, Boeing 702 satellites have used electric propulsion for transfer to geostationary orbits. The use of the 25cm Xenon Ion Propulsion System (25cm XIPS) results in more than a tenfold increase in specific impulse with the corresponding decrease in propellant mass needed to complete the mission when compared to chemical propulsion[1]. In addition to more favorable mass properties, with the use of XIPS, the 702 has been able to achieve orbit insertions with higher accuracy than it would have been possible with the use of chemical thrusters. This paper describes the experience attained by using the 702 XIPS ascent strategy to transfer satellite to geosynchronous orbits.

  14. STS-65 crewmembers participate in bench review at Boeing Building

    NASA Technical Reports Server (NTRS)

    1994-01-01

    Attired in clean suits, STS-65 Payload Commander (PLC) Richard J. Hieb (left) and Payload Specialist Chiaki Mukai examine the contents of a stowage locker during a bench review at Boeing's Flight Equipment Processing Facility (FEPF) near the Johnson Space Center (JSC). In the background, Commander Robert D. Cabana inspects additional equipment to be carried aboard the Space Shuttle Columbia, Orbiter Vehicle (OV) 102, for the scheduled July flight of the second International Microgravity Laboratory (IML-2) mission. Mukai represents Japan's National Space Development Agency (NASDA). Photo taken by NASA JSC contract photographer Scott A. Wickes.

  15. Runway Incursion Prevention System ADS-B and DGPS Data Link Analysis Dallas-Fort Worth International Airport

    NASA Technical Reports Server (NTRS)

    Timmerman, J.; Jones, Denise R. (Technical Monitor)

    2001-01-01

    A Runway Incursion Prevention System (RIPS) was tested at the Dallas - Ft. Worth International Airport in October 2000. The system integrated airborne and ground components to provide both pilots and controllers with enhanced situational awareness, supplemental guidance cues, a real-time display of traffic information, and warning of runway incursions in order to prevent runway incidents while also improving operational capability. Rockwell Collins provided and supported a prototype Automatic Dependent Surveillance - Broadcast (ADS-B) system using 1090 MHz and a prototype Differential GPS (DGPS) system onboard the NASA Boeing 757 research aircraft. This report describes the Rockwell Collins contributions to the RIPS flight test, summarizes the development process, and analyzes both ADS-B and DGPS data collected during the flight test. In addition, results are report on interoperability tests conducted between the NASA Advanced General Aviation Transport Experiments (AGATE) ADS-B flight test system and the NASA Boeing 757 ADS-B system.

  16. Boeing Satellite Television Airplane Receiving System (STARS) performance

    NASA Technical Reports Server (NTRS)

    Vertatschitsch, Edward J.; Fitzsimmons, George W.

    1995-01-01

    Boeing Defense and Space Group is developing a Satellite Television Airplane Receiving System (STARS) capable of delivering Direct Broadcast Satellite (DBS) television to an aircraft in-flight. This enables a new service for commercial airplanes that will make use of existing and future DBS systems. The home entertainment satellites, along with STARS, provide a new mobile satellite communication application. This paper will provide a brief background of the antenna issues associated with STARS for commercial airplanes and then describe the innovative Boeing phased-array solution to these problems. The paper then provides a link budget of the STARS using the Hughes DBS as an example, but the system will work with all of the proposed DBS satellites in the 12.2-12.7 GHz band. It concludes with operational performance calculations of the STARS system, supported by measured test data of an operational 16-element subarray. Although this system is being developed for commercial airplanes, it is well suited for a wide variety of mobile military and other commercial communications systems in air, on land and at sea. The applications include sending high quality video for the digital battlefield and large volumes of data on the information superhighway at rates in excess of 350 Mbps.

  17. Orientifolded locally AdS3 geometries

    NASA Astrophysics Data System (ADS)

    Loran, F.; Sheikh-Jabbari, M. M.

    2011-01-01

    Continuing the analysis of [Loran F and Sheikh-Jabbari M M 2010 Phys. Lett. B 693 184-7], we classify all locally AdS3 stationary axi-symmetric unorientable solutions to AdS3 Einstein gravity and show that they are obtained by applying certain orientifold projection on AdS3, BTZ or AdS3 self-dual orbifold, respectively, O-AdS3, O-BTZ and O-SDO geometries. Depending on the orientifold fixed surface, the O-surface, which is either a space-like 2D plane or a cylinder, or a light-like 2D plane or a cylinder, one can distinguish four distinct cases. For the space-like orientifold plane or cylinder cases, these geometries solve AdS3 Einstein equations and are hence locally AdS3 everywhere except at the O-surface, where there is a delta-function source. For the light-like cases, the geometry is a solution to Einstein equations even at the O-surface. We discuss the causal structure for static, extremal and general rotating O-BTZ and O-SDO cases as well as the geodesic motion on these geometries. We also discuss orientifolding Poincaré patch AdS3 and AdS2 geometries as a way to geodesic completion of these spaces and comment on the 2D CFT dual to the O-geometries.

  18. Boeing 747 with Smoke Generator Installed for Vortex Study

    NASA Technical Reports Server (NTRS)

    1979-01-01

    The Boeing 747 used for wingtip vortex research flights sits on the ramp at NASA's Flight Research Center in Edwards, California. Note the smoke generator mounted underneath the jet's wing. Smoke from underwing smoke generators made it possible for researchers to actually see the vortices created by the 747's wings in flight. In 1974 the NASA Flight Research Center (later Dryden Flight Research Center, Edwards, California) used a Boeing 747 as part of the overall NASA study of trailing vortices. Trailing vortices are the invisible flow of spiraling air that trails from the wings of large aircraft and can 'upset' smaller aircraft flying behind them. The 747 that NASA used was on loan from the Johnson Space Center where it was part of the Space Shuttle Program. The data gathered in the 747 studies complemented data from the previous (1973-74) joint NASA Flight Research Center and Federal Aviation Administration (FAA) Boeing727 wake vortices study. Six smoke generators were installed under the wings of the 747 to provide a visual image of the trailing vortices. The object of the experiments was to test different configurations and mechanical devices on the747 that could be used to break up or lessen the strength of the vortices. The results of the tests could lead to shorter spacing between landings and takeoffs, which, in turn, could alleviate air-traffic congestion. For approximately 30 flights the 747 was flown using various combinations of wing air spoilers in an attempt to reduce wake vortices. To evaluate the effectiveness of the different configurations, chase aircraft were flown into the vortex sheets to probe their strengths and patterns at different times. Two of the chase planes used were the Flight Research Center's Cessna T-37 and the NASA Ames Research Center's Learjet. These aircraft represented the types of smaller business jets and other small aircraft that might encounter large passenger aircraft on approach or landings around major airports or in

  19. Diffraction and pulse slippage in the Boeing 1 kW FEL oscillator

    SciTech Connect

    Blau, J.; Wong, R.K.; Colson, W.B.

    1995-12-31

    A four-dimensional simulation in x, y, z, and t, including betatron motion of the electrons, is used to study the combined effects of diffraction, pulse slippage and desynchronism in the Boeing 1 kW FEL oscillator.

  20. 1. General view of Boeing EC135 looking aircraft. View to ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. General view of Boeing EC-135 looking aircraft. View to west. - Offutt Air Force Base, Looking Glass Airborne Command Post, Looking Glass Aircraft, On Operational Apron covering northeast half of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  1. Simultaneous cabin and ambient ozone measurements on two Boeing 747 airplanes, volume 1

    NASA Technical Reports Server (NTRS)

    Perkins, P. J.; Holdeman, J. D.; Nastrom, G. D.

    1979-01-01

    Measurements of zone concentrations both outside and in the cabin of an airline operated Boeing 747SP and Boeing 747-100 airliner are presented. Plotted data and the corresponding tables of observations taken at altitude between the departure and destination airports of each flight are arranged chronologically for the two aircraft. Data were taken at five or ten minute intervals by automated instrumentation used in the NACA Global Atmospheric Sampling Program.

  2. Advanced Rotorcraft Transmission (ART) program-Boeing helicopters status report

    NASA Technical Reports Server (NTRS)

    Lenski, Joseph W., Jr.; Valco, Mark J.

    1991-01-01

    The Advanced Rotorcraft Transmission (ART) program is structured to incorporate key emerging material and component technologies into an advanced rotorcraft transmission with the intention of making significant improvements in the state of the art (SOA). Specific objectives of ART are: (1) Reduce transmission weight by 25 pct.; (2) Reduce transmission noise by 10 dB; and (3) Improve transmission life and reliability, while extending Mean Time Between Removal to 5000 hr. Boeing selected a transmission sized for the Tactical Tilt Rotor (TTR) aircraft which meets the Future Air Attack Vehicle (FAVV) requirements. Component development testing will be conducted to evaluate the high risk concepts prior to finalizing the advanced transmission configuration. The results of tradeoff studies and development test which were completed are summarized.

  3. Boeing 18-Inch Fan Rig Broadband Noise Test

    NASA Technical Reports Server (NTRS)

    Ganz, Ulrich W.; Joppa, Paul D.; Patten, Timothy J.; Scharpf, Daniel F.

    1998-01-01

    The purposes of the subject test were to identify and quantify the mechanisms by which fan broadband noise is produced, and to assess the validity of such theoretical models of those mechanisms as may be available. The test was conducted with the Boeing 18-inch fan rig in the Boeing Low-Speed Aeroacoustic Facility (LSAF). The rig was designed to be particularly clean and geometrically simple to facilitate theoretical modeling and to minimize sources of interfering noise. The inlet is cylindrical and is equipped with a boundary layer suction system. The fan is typical of modern high-by-pass ratio designs but is capable of operating with or without fan exit guide vanes (stators), and there is only a single flow stream. Fan loading and tip clearance are adjustable. Instrumentation included measurements of fan performance, the unsteady flow field incident on the fan and stators, and far-field and in-duct acoustic fields. The acoustic results were manipulated to estimate the noise generated by different sources. Significant fan broadband noise was found to come from the rotor self-noise as measured with clean inflow and no boundary layer. The rotor tip clearance affected rotor self-noise somewhat. The interaction of the rotor with inlet boundary layer turbulence is also a significant source, and is strongly affected by rotor tip clearance. High level noise can be generated by a high-order nonuniform rotating at a fraction of the fan speed, at least when tip clearance and loading are both large. Stator-generated noise is the loudest of the significant sources, by a small margin, at least on this rig. Stator noise is significantly affected by propagation through the fan.

  4. Warped AdS3 black holes

    NASA Astrophysics Data System (ADS)

    Anninos, Dionysios; Li, Wei; Padi, Megha; Song, Wei; Strominger, Andrew

    2009-03-01

    Three dimensional topologically massive gravity (TMG) with a negative cosmological constant -l-2 and positive Newton constant G admits an AdS3 vacuum solution for any value of the graviton mass μ. These are all known to be perturbatively unstable except at the recently explored chiral point μl = 1. However we show herein that for every value of μl ≠ 3 there are two other (potentially stable) vacuum solutions given by SL(2,Bbb R) × U(1)-invariant warped AdS3 geometries, with a timelike or spacelike U(1) isometry. Critical behavior occurs at μl = 3, where the warping transitions from a stretching to a squashing, and there are a pair of warped solutions with a null U(1) isometry. For μl > 3, there are known warped black hole solutions which are asymptotic to warped AdS3. We show that these black holes are discrete quotients of warped AdS3 just as BTZ black holes are discrete quotients of ordinary AdS3. Moreover new solutions of this type, relevant to any theory with warped AdS3 solutions, are exhibited. Finally we note that the black hole thermodynamics is consistent with the hypothesis that, for μl > 3, the warped AdS3 ground state of TMG is holographically dual to a 2D boundary CFT with central charges c_R-formula and c_L-formula.

  5. Warped AdS3 black holes

    NASA Astrophysics Data System (ADS)

    Song, Wei; Anninos, Dionysios; Li, Wei; Padi, Megha; Strominger, Andrew

    2009-03-01

    Three dimensional topologically massive gravity (TMG) with a negative cosmological constant -ell-2 and positive Newton constant G admits an AdS3 vacuum solution for any value of the graviton mass μ. These are all known to be perturbatively unstable except at the recently explored chiral point μell = 1. However we show herein that for every value of μell ≠ 3 there are two other (potentially stable) vacuum solutions given by SL(2,Bbb R) × U(1)-invariant warped AdS3 geometries, with a timelike or spacelike U(1) isometry. Critical behavior occurs at μell = 3, where the warping transitions from a stretching to a squashing, and there are a pair of warped solutions with a null U(1) isometry. For μell > 3, there are known warped black hole solutions which are asymptotic to warped AdS3. We show that these black holes are discrete quotients of warped AdS3 just as BTZ black holes are discrete quotients of ordinary AdS3. Moreover new solutions of this type, relevant to any theory with warped AdS3 solutions, are exhibited. Finally we note that the black hole thermodynamics is consistent with the hypothesis that, for μell > 3, the warped AdS3 ground state of TMG is holographically dual to a 2D boundary CFT with central charges c_R-formula and c_L-formula.

  6. 78 FR 1772 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-09

    ... actions specified in the existing AD. We are proposing this AD to detect and correct fatigue cracking... if necessary. That AD resulted from several reports of fatigue cracking at that location. We issued that AD to detect and correct such fatigue cracking, which could result in rapid decompression of...

  7. Contact hysteroscopy.

    PubMed

    Baggish, M S; Barbot, J

    1983-06-01

    In 1907 innovations in optics and illumination made by Maximilian Nitze were applied to hysteroscopy by Charles David, who wrote a treatise of hysteroscopy. David improved illumination by placing an electric incandescent bulb at the intrauterine end of his endoscope and also sealed the distal end of the tube with a piece of glass. The history of the contact endoscope that the authors personally used is connected to the invention by Vulmiere (1952) of a revolutionary illumination process in endoscopy--the "cold light" process. The components of cold light consist of a powerful external light source that is transmitted via a special optical guide into the endometrial cavity. The 1st application of his principle (1963) was an optical trochar contained in a metallic sheath. This simple endoscope was perfected, and in 1973 Barbot and Parent, in France, began to use it to examine the uterine cavity. Discussion focuses on methods, instrumentation, method for examination (grasping the instrument, setup, light source, anesthesia, dilatation, technique, and normal endometrium); cervical neoplasia; nonneoplastic lesions of the endometrium (endometrial polyp, submucous myoma, endometrial hyperplasia); intrauterine device localization; neoplastic lesions of the endometrium; precursors (adenocarcinoma); hysteroscopy in pregnancy (embryoscopy, hydatidiform mole, postpartum hemorrhage, incomplete abortion, spontaneous abortion, induced abortions, and amnioscopy); and examinations of children and infants. The contact endoscope must make light contact with the structure to be viewed. The principles of contact endoscopy depend on an interpretation of color, contour, vascular pattern, and a sense of touch. These are computed together and a diagnosis is made on the basis of previously learned clinical pathologic correlations. The contact endoscope is composed of 3 parts: an optical guide; a cylindric chamber that collects and traps ambient light; and a magnifying eyepiece. The phase of

  8. Segmented strings in AdS 3

    NASA Astrophysics Data System (ADS)

    Callebaut, Nele; Gubser, Steven S.; Samberg, Andreas; Toldo, Chiara

    2015-11-01

    We study segmented strings in flat space and in AdS 3. In flat space, these well known classical motions describe strings which at any instant of time are piecewise linear. In AdS 3, the worldsheet is composed of faces each of which is a region bounded by null geodesics in an AdS 2 subspace of AdS 3. The time evolution can be described by specifying the null geodesic motion of kinks in the string at which two segments are joined. The outcome of collisions of kinks on the worldsheet can be worked out essentially using considerations of causality. We study several examples of closed segmented strings in AdS 3 and find an unexpected quasi-periodic behavior. We also work out a WKB analysis of quantum states of yo-yo strings in AdS 5 and find a logarithmic term reminiscent of the logarithmic twist of string states on the leading Regge trajectory.

  9. 78 FR 61388 - TA-W-82,705, the Boeing Company Boeing Commercial Aircraft, (BCA) Including On-Site Leased...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-03

    ...) Including On-Site Leased Workers From Chipton Ross, Inc., CTS Technical Services, Inc., Moseley Technical... Workers From Adecco, USA, Inc., Cascade Engineering, CDI Corporation, Chipton Ross, Inc., Comforce... Boeing Commercial Aircraft, (BCA) Including On-Site Leased Workers From Adecco USA, Inc., Chipton...

  10. Types of Contact Lenses

    MedlinePlus

    ... Consumer Devices Consumer Products Contact Lenses Types of Contact Lenses Share Tweet Linkedin Pin it More sharing ... Orthokeratology (Ortho-K) Decorative (Plano) Contact Lenses Soft Contact Lenses Soft contact lenses are made of soft, ...

  11. Prioritized Contact Transport Stream

    NASA Technical Reports Server (NTRS)

    Hunt, Walter Lee, Jr. (Inventor)

    2015-01-01

    A detection process, contact recognition process, classification process, and identification process are applied to raw sensor data to produce an identified contact record set containing one or more identified contact records. A prioritization process is applied to the identified contact record set to assign a contact priority to each contact record in the identified contact record set. Data are removed from the contact records in the identified contact record set based on the contact priorities assigned to those contact records. A first contact stream is produced from the resulting contact records. The first contact stream is streamed in a contact transport stream. The contact transport stream may include and stream additional contact streams. The contact transport stream may be varied dynamically over time based on parameters such as available bandwidth, contact priority, presence/absence of contacts, system state, and configuration parameters.

  12. 77 FR 51722 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-27

    ... that AD to prevent electrical energy from lightning, hot shorts, or fault current from entering the... that AD to prevent electrical energy from lightning, hot shorts, or fault current from entering...

  13. 77 FR 13187 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-06

    ... external doublers and antennas, and at locations where external decals had been cut. We are issuing this AD... doublers and antennas, and at locations where external decals had been cut. We are issuing this AD...

  14. 76 FR 77367 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-13

    ... location were manufactured improperly using anodized aluminum. This AD requires replacing the anodized rub... aluminum. We are issuing this AD to prevent inadequate electrical bonding between the rub strips and...

  15. 78 FR 23468 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-19

    ... (j)(2) of this AD regarding the language in the service information. In addition, we added a..., and (4) Will not have a significant economic impact, positive or negative, on a substantial number...

  16. 77 FR 45513 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-01

    ... proposed AD was prompted by a report of elevator vibration and bearing swage failures. This proposed AD... vibration. Consequent structural failure of the elevator or horizontal stabilizer could result in loss of... proposed AD. Discussion We received a report of elevator vibration and bearing swage failures on Model...

  17. 78 FR 21571 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-11

    ... AD would also require installing a fiberglass reinforcement overcoat to the top surface of the aft...- NM-005-AD. (a) Comments Due Date We must receive comments by May 28, 2013. (b) Affected ADs None. (c... found. (2) Install a fiberglass reinforcement overcoat to the top surface of the aft MEC drip...

  18. 77 FR 57541 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-18

    ...-600 series airplanes. This proposed AD was prompted by reports of early fatigue cracks at chem- mill areas on the crown skin panels. This proposed AD would require repetitive inspections for cracking of... this AD to detect and correct fatigue cracking of the skin panel at the specified chem- ] mill...

  19. 77 FR 27142 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-09

    ... airplanes. This proposed AD was prompted by multiple reports of cracks of overwing frames. This proposed AD would require repetitive inspections for cracking of the overwing frames, and related investigative and corrective actions if necessary. We are proposing this AD to detect and correct such cracking that...

  20. 78 FR 25369 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-01

    ... airplanes. This AD was prompted by reports of early fatigue cracks at chem-mill areas on the crown skin panels. This AD requires repetitive inspections for cracking of the fuselage skin at certain locations at chem-mill areas, and repair if necessary. We are issuing this AD to detect and correct fatigue...

  1. 78 FR 23465 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-19

    ... AD was prompted by reports of early fatigue cracks at chem-mill areas on the crown skin panels. This AD requires repetitive inspections for cracking of the fuselage skin at certain locations at chem-mill areas, and repair if necessary. We are issuing this AD to detect and correct fatigue cracking...

  2. 77 FR 48423 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-14

    ... AD was prompted by reports of chem-mill step cracking on the aft lower lobe fuselage skins. This AD requires inspections of the fuselage skin at the chem- mill steps, and repair if necessary. We are issuing this AD to detect and correct cracking on the aft lower lobe fuselage skins, which could result...

  3. 76 FR 77157 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-12

    .... Additionally, this proposed AD would require installing Aero-Engine database (AEDB) software in the airplane..., environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing... actions required by paragraph (g) of this AD, install Aero-Engine database software, software part...

  4. 78 FR 45054 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-26

    ... locator transmitter (ELT), and corrective action if necessary. This AD was prompted by a report of a fire involving a Honeywell fixed ELT. We are issuing this AD to prevent a fire in the aft crown of the airplane, or to detect and correct discrepancies within the ELT that could cause such a fire. DATES: This AD...

  5. 77 FR 24831 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-26

    ... corrosion on ATSDs. This AD requires revising the maintenance program to incorporate certain limitations. We are issuing this AD to detect and correct corrosion on ATSDs, which could result in the loss of high...) Unsafe Condition This AD was prompted by multiple reports of corrosion on ATSDs. We are issuing this...

  6. 78 FR 16198 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-14

    ... channel. The existing AD resulted from fuel system reviews conducted by the manufacturer. Since we issued that AD, we have identified additional center upper auxiliary fuel tank locations where inspections and... extruded channel. That AD resulted from fuel system reviews conducted by the manufacturer. We issued...

  7. 78 FR 39633 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-02

    ... requirements of paragraphs (g), (h), (i), (j), (k), and (l) of this AD. (2) Replacing a type A wedge with a...) paragraph (k). paragraph (g) paragraph (l). paragraph (h) paragraph (m). paragraph (i) paragraph (n... paragraph (k) of this AD. (2) For the purposes of this AD, a detailed inspection is: ``An...

  8. 78 FR 66254 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-05

    .... Inspection (new action) 259 work-hours x 0 $22,015 per $1,849,260 per $85 per hour = inspection cycle..., 2013. (b) Affected ADs This AD supersedes AD 2009-10-06, Amendment 39-15901 (74 FR 22424, May 13,...

  9. 78 FR 54387 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-04

    ... loads. DATES: This AD is effective October 9, 2013. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of October 9, 2013. ADDRESSES: For... Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD...

  10. 77 FR 46340 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-03

    ... incorrect torque values. This proposed AD would require, for previously modified airplanes, repetitive..., with corrected torque values, would terminate the requirements of the AD. This proposed AD would also..., Washington. For information on the availability of this material at the FAA, call 425-227-1221. Examining...

  11. 76 FR 70377 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-14

    .... This proposed AD would require adding design features to detect electrical faults, to detect a pump running in an empty fuel tank, and to ensure that a fuel pump's operation is not affected by certain... proposed AD. Discussion The FAA has examined the underlying safety issues involved in fuel tank...

  12. 78 FR 49913 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-16

    ... is subject to widespread fatigue damage. This AD requires repetitive high frequency eddy current... are issuing this AD to detect and correct fatigue cracking at the frame-to-floor beam attachment, on... widespread fatigue damage. We are issuing this AD to detect and correct fatigue cracking at the...

  13. 77 FR 57990 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-19

    ... AD was prompted by several reports of fatigue cracking at that location. We are issuing this AD to detect and correct such fatigue cracking, which could result in rapid decompression of the fuselage...) Unsafe Condition This AD was prompted by several reports of fatigue cracks in the aft pressure...

  14. 77 FR 10403 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-22

    ... of certain doors and flaps was done based on their fatigue-critical nature. This proposed AD would... applicability. We are proposing this AD to detect and correct fatigue cracking of the principal structural... to the airworthiness limitation instructions (ALI). We issued that AD to ensure that fatigue...

  15. 77 FR 3187 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-23

    ... certain Model 767-200 and -300 series airplanes. This proposed AD was prompted by reports of fatigue... proposing this AD to detect and correct fatigue cracking on the lower main sill inner chord of the hatch... proposed AD. Discussion We received reports of fatigue cracking on the lower main sill inner chord of...

  16. Ares I Aerodynamic Testing at the Boeing Polysonic Wind Tunnel

    NASA Technical Reports Server (NTRS)

    Pinier, Jeremy T.; Niskey, Charles J.; Hanke, Jeremy L.; Tomek, William G.

    2011-01-01

    Throughout three full design analysis cycles, the Ares I project within the Constellation program has consistently relied on the Boeing Polysonic Wind Tunnel (PSWT) for aerodynamic testing of the subsonic, transonic and supersonic portions of the atmospheric flight envelope (Mach=0.5 to 4.5). Each design cycle required the development of aerodynamic databases for the 6 degree-of-freedom (DOF) forces and moments, as well as distributed line-loads databases covering the full range of Mach number, total angle-of-attack, and aerodynamic roll angle. The high fidelity data collected in this facility has been consistent with the data collected in NASA Langley s Unitary Plan Wind Tunnel (UPWT) at the overlapping condition ofMach=1.6. Much insight into the aerodynamic behavior of the launch vehicle during all phases of flight was gained through wind tunnel testing. Important knowledge pertaining to slender launch vehicle aerodynamics in particular was accumulated. In conducting these wind tunnel tests and developing experimental aerodynamic databases, some challenges were encountered and are reported as lessons learned in this paper for the benefit of future crew launch vehicle aerodynamic developments.

  17. The BOEING 777 - concurrent engineering and digital pre-assembly

    SciTech Connect

    Abarbanel, B.

    1996-12-31

    The processes created on the 777 for checking designs were called {open_quotes}digital pre-assembly{close_quotes}. Using FlyThru(tm), a spin-off of a Boeing advanced computing research project, engineers were able to view up to 1500 models (15000 solids) in 3d traversing that data at high speed. FlyThru(tm) was rapidly deployed in 1991 to meet the needs of the 777 for large scale product visualization and verification. The digital pre-assembly process has bad fantastic results. The 777 has had far fewer assembly and systems problems compared to previous airplane programs. Today, FlyThru(tm) is installed on hundreds of workstations on almost every airplane program, and is being used on Space Station, F22, AWACS, and other defense projects. It`s applications have gone far beyond just design review. In many ways, FlyThru is a Data Warehouse supported by advanced tools for analysis. It is today being integrated with Knowledge Based Engineering geometry generation tools.

  18. 78 FR 36084 - Special Conditions: The Boeing Company, Model 717-200 Series Airplanes; Seats With Inflatable...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-17

    ... flammability of the airbag material. The Boeing Model 717-200 series airplanes will use the similar airbag... Series Airplanes; Seats With Inflatable Lapbelts AGENCY: Federal Aviation Administration (FAA), DOT... the Boeing Model 717- 200 series airplanes. These airplanes will have a novel or unusual...

  19. 76 FR 14794 - Special Conditions: Boeing Model 747-8 Airplanes, Systems and Data Networks Security-Isolation or...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-18

    ... Federal Aviation Administration 14 CFR Part 25 Special Conditions: Boeing Model 747-8 Airplanes, Systems and Data Networks Security--Isolation or Protection From Unauthorized Passenger Domain Systems Access... special conditions are issued for Boeing Model 747-8 airplanes. This airplane will have novel or...

  20. 76 FR 4567 - Airworthiness Directives; The Boeing Company Model 737-600, -700, -700C, -800, and -900 Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-26

    ... Attention Service Bulletin 737-30-1058, Revision 3, dated July 7, 2010. The service information describes..., certificated in any category, as identified in Boeing Special Attention Service Bulletin 737-30- 1058, Revision... accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin...

  1. 76 FR 62649 - Airworthiness Directives; The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-11

    ... accordance with Boeing Special Attention Service Bulletin 737-78-1074, Revision 1, dated September 15, 2005... Bulletin 737- 78-1074, Revision 1, dated September 15, 2005, and that the replacement of the non-fireproof... airplanes, which is what is listed in Boeing Special Attention Service Bulletin 737-78-1074, Revision...

  2. 77 FR 16143 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-20

    ...., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Tung Tran, Aerospace Engineer, Propulsion Branch, ANM..., Aerospace Engineer, Propulsion Branch, ANM-140S, Seattle Aircraft Certification Office (ACO), FAA, 1601...

  3. AdS duals of matrix strings

    NASA Astrophysics Data System (ADS)

    Morales, Jose F.; Samtleben, Henning

    2003-06-01

    We review recent work on the holographic duals of type II and heterotic matrix string theories described by warped AdS3 supergravities. In particular, we compute the spectra of Kaluza-Klein primaries for type I, II supergravities on warped AdS3 × S7 and match them with the primary operators in the dual two-dimensional gauge theories. The presence of non-trivial warp factors and dilaton profiles requires a modification of the familiar dictionary between masses and 'scaling' dimensions of fields and operators. We present these modifications for the general case of domain wall/QFT correspondences between supergravities on warped AdSd+1 × Sq geometries and super Yang-Mills theories with 16 supercharges.

  4. 76 FR 71472 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-18

    ... seal contacts the 12-o'clock engine strut, and for correct stiffness and vent holes, and doing... edge of the thrust reverser, where the fire seal contacts the 12-o'clock engine strut. The damage has... remained in service for an extended time, damage also could result to the 12-o'clock strut structure...

  5. 78 FR 61161 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-03

    ...-140, 1200 New Jersey Avenue SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Nenita Odesa....odesa@faa.gov . SUPPLEMENTARY INFORMATION: Discussion We issued a notice of proposed rulemaking (NPRM..., contact Nenita Odesa, Aerospace Engineer, Airframe Branch, ANM-120L, FAA, Los Angeles...

  6. Dual-band infrared (DBIR) imaging inspections of Boeing 737 and KC-135 aircraft panels

    SciTech Connect

    Del Grande, N.K.; Dolan, K.W.; Durbin, P.F.; Gorvad, M.R.; Shapiro, A.B.

    1993-08-27

    We apply dual-band infrared (DBIR) imaging as a dynamic thermal tomography tool for wide area inspection of a Boeing 737 aircraft, and several Boeing KC-135 aircraft panels. Our analyses are discussed in this report. After flash-heating the aircraft skin, we record synchronized DBIR images every 40 ms, from onset to 8 seconds after the heat flash. We analyze selective DBIR image ratios which enhance surface temperature contrast and remove surface-emissivity clutter (from dirt, dents, tape, markings, ink, sealants, uneven paint, paint stripper, exposed metal and roughness variations). The Boeing 737 and KC-135 aircraft fuselage panels have varying percent thickness losses from corrosion. We established the correlation of percent thickness loss with surface temperature rise (above ambient) for a partially corroded F-18 wing box structure and several aluminum reference panels. Based on this correlation, lap splice temperatures rise 1{degrees}C per 24 {plus_minus} 5 % material loss at 0.4 s after the heat flash. We show tables, charts and temperature maps of typical lap splice material losses for the riveted (and bonded) Boeing 737, and the riveted (but unbonded) Boeing KC-135. We map the fuselage composite thermal inertia, based on the (inverse) slope of the surface temperature versus inverse square root of time. Composite thermal inertia maps characterize shallow skin defects within the lap splice at early times (<0.3 s) and deeper skin defects within the lap splice at late times (>0.4 s). Late time composite thermal inertia maps depict where corrosion-related thickness losses occur. Lap splice sites on a typical Boeing KC-135 panel with low composite thermal inertia values had high skin-thickness losses from corrosion.

  7. 78 FR 71989 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-02

    ...-8F series airplanes. This AD requires repetitive ultrasonic or dye penetrant inspections for cracking.... (2) Dye penetrant inspection for cracking of the bolts and barrel nuts. Whenever a dye penetrant... this AD. (2) For airplanes on which a dye penetrant inspection was done, do the required actions at...

  8. 78 FR 55662 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-11

    ... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM...-10, DC-9-30, and DC-9-40 series airplanes. This proposed AD was prompted by an evaluation by the... integrity of the airplane. DATES: We must receive comments on this proposed AD by October 28,...

  9. 78 FR 26720 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-08

    ... airplanes. The existing AD requires, for certain airplanes, an inspection to determine the material of an..., dated December 22, 2010, but airplane groups were changed based on the material composition of the.... The proposed AD would add, for certain airplanes, an inspection to determine material type of...

  10. 77 FR 63714 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-17

    ... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a... airplanes. This AD was prompted by a report of elevator vibration and bearing swage failures. This AD requires, for certain airplanes, repetitive inspections for any discrepancies (such as a gap or a...

  11. 78 FR 78703 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-27

    ... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a... series airplanes. This AD was prompted by an evaluation by the design approval holder (DAH) indicating... bulkhead, which could result in reduced structural integrity of the airplane. DATES: This AD is...

  12. 78 FR 28128 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-14

    ... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a... airplanes. This AD was prompted by reports of two in-service occurrences on Model 737-400 airplanes of total..., inability to restart the engines, and consequent forced landing of the airplane. DATES: This AD is...

  13. 77 FR 12166 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-29

    ... Company Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are... series airplanes. That AD currently requires inspecting certain power feeder wire bundles for damage... certain airplanes. This AD was prompted by a report that a power feeder wire bundle chafed against...

  14. 78 FR 60673 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-02

    ... the control column shaker during takeoff. This AD requires performing a general visual inspection to... performing a general visual inspection to determine if a certain angle of attack (AOA) sensor with a paddle... done. (g) Inspection Within 36 months after the effective date of this AD: Do a general...

  15. 78 FR 11569 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-19

    ... track of slats 1 and 10; a detailed inspection of all slat track housings for foreign object debris (FOD... puncture in the slat track housing and lead to a fuel leak and potential fire. DATES: This AD is effective... potential fire. (f) Compliance Comply with this AD within the compliance times specified, unless...

  16. 78 FR 60679 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-02

    ... prompted by multiple reports of cracks of overwing frames. This AD requires repetitive inspections for cracking of the overwing frames, and corrective actions if necessary. We are issuing this AD to detect and correct such cracking that could sever a frame, which may increase the loading of adjacent frames,...

  17. 78 FR 24338 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-25

    ... airplanes. This AD was prompted by reports of early fatigue cracks at chem-mill areas on the crown skin panels. This AD requires repetitive inspections for cracking of the fuselage skin along chem-mill steps... detect and correct fatigue cracking of the skin panel at the specified chem-mill step locations,...

  18. 77 FR 24355 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-24

    ..., and 777F series airplanes. This AD was prompted by reports of cracks found in the Web pockets of the... frequency eddy current inspections for cracks of the WCS spanwise beams, and repair if necessary. We are issuing this AD to detect and correct cracking in the WCS spanwise beams, which could result in...

  19. 77 FR 2664 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-19

    ... airplanes. This proposed AD was prompted by reports of cracks found on the center section ribs of the horizontal stabilizers. This proposed AD would require repetitive inspections for cracking of the aft face of... crack measurement, repairs, and installation of a new center section rib if necessary. We are...

  20. 78 FR 76047 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-16

    ..., and 747SR series airplanes. This AD was prompted by reports of cracks of both lower chords and web on certain outboard struts. This AD requires repetitive inspections for cracking of the lower spar chords and web, web lower spar chord modification, which includes inspections for cracking of the lower...

  1. 77 FR 57536 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-18

    ...-700 and -700C series airplanes. This proposed AD was prompted by reports of early fatigue cracks at... cracking of the fuselage skin at certain locations at chem-mill areas, and repair if necessary. We are proposing this AD to detect and correct fatigue cracking of the skin panel at the specified chem-mill...

  2. 78 FR 25372 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-01

    ... AD was prompted by reports of early fatigue cracks at chem-mill areas on the crown skin panels. This AD requires repetitive inspections for cracking of the fuselage skin along chem-mill steps at certain... correct fatigue cracking of the skin panel at the specified chem-mill step locations, which could...

  3. 77 FR 69744 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-21

    ... airplanes. This AD was prompted by reports of cracks in the inner chords at both left-side and right-side... transition radius for cracks, and related investigative and corrective actions if necessary. We are issuing this AD to prevent large cracks in the frames and adjacent structure that can adversely affect...

  4. 78 FR 43763 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-22

    ... airplanes. This AD was prompted by reports of cracking in the outboard flange of the longeron extension... of the longeron extension fittings for cracking, and corrective actions if necessary. We are issuing this AD to detect and correct cracks in the longeron extension fittings, which can become large...

  5. 78 FR 60807 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-02

    ... cracking found in the skin at the lower aft corner of the forward entry doorway on airplanes that do not have an airstair door cutout. This proposed AD would require repetitive inspections for cracking in the... repair if necessary. We are proposing this AD to detect and correct cracking in the lower corners of...

  6. 77 FR 46932 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-07

    ... by reports of cracks of the underwing longeron fittings in the wing center section. This AD requires repetitive inspections of the underwing longeron fitting for cracking, and related investigative and corrective actions if necessary. We are issuing this AD to detect and correct such cracking, which...

  7. 77 FR 56170 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-12

    ... protective surface coating to attach pins of the horizontal stabilizer rear spar. This proposed AD would... receive about this proposed AD. Discussion We received reports of pins with an unapproved surface coating... and corrosion protective surface coating was used by a supplier. The pins were installed on...

  8. 77 FR 70362 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-26

    ..., along the bend radius of the chord on several airplanes. This AD requires a general visual inspection to... main entry door number 1 upper main sill outer chord, along the bend radius of the chord, which could..., along the bend radius of the chord on several airplanes. We are issuing this AD to detect and...

  9. 77 FR 11416 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-27

    ... from the manufacturer that center overhead stowage (COS) boxes could fall from their supports under.... This proposed AD would require modifying COS boxes by installing new brackets, stiffeners, and hardware as needed. We are proposing this AD to prevent detachment of COS boxes at forward load levels...

  10. 78 FR 48835 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-12

    ... requires repetitive detailed inspections for cracking of the aft tension tie channels from body station (BS... proposed AD. Discussion On August 2, 2007, we issued AD 2007-16-19, Amendment 39-15158 (72 FR 45151, August... body station (BS) 1120 to BS 1220 and from BS 880 to BS 1100, and corrective actions if necessary....

  11. 78 FR 27010 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-09

    ... adds airplanes to the applicability. This AD was prompted by reports that the work sequence and..., ``General requirements.'' Under that section, Congress charges the FAA with promoting safe flight of civil.... (e) Unsafe Condition This AD was prompted by reports that the work sequence and procedures...

  12. 78 FR 66859 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-07

    ... airplanes. This proposed AD was prompted by reports of bearing damage at certain trailing edge (TE) flap support rib assemblies. This proposed AD would require inspecting certain TE flap support rib assemblies... TE flap support bearings, which can result in damage to the TE rotary actuators and consequent...

  13. 78 FR 70214 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-25

    ... issuing this AD to detect and correct fatigue cracks in the fuselage skin that can propagate and grow, and... the economic burden on any operator or increase the scope of this AD. Costs of Compliance We estimate... economic impact, positive or negative, on a substantial number of small entities under the criteria of...

  14. 77 FR 64696 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-23

    ... flammable fluid leaks from the wing leading edge area onto the engine exhaust area. This AD requires modification of the fluid drain path in the leading edge area of the wing. We are issuing this AD to prevent... modifying the fluid drain path in the leading edge area of the wing. Comments We gave the public...

  15. 78 FR 15658 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-12

    ... airplanes. This proposed AD was prompted by reports of spanwise cracks and corrosion in the wing center box... other airplanes, repetitive inspections for damage, cracking, and corrosion of the pressure seal; and repair if necessary. We are proposing this AD to detect and correct cracking and corrosion of the...

  16. 78 FR 24673 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-26

    ... unsafe condition for in-service airplanes. For all future delivered airplanes, the replacement batteries... airplanes. That AD currently requires modification of the battery system, or other actions. This AD requires installing main and auxiliary power unit (APU) battery enclosures and environmental control system...

  17. 78 FR 17285 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-21

    ... of stiff operation of the elevator pitch control system and jammed elevator controls. This AD... issuing this AD to prevent moisture from collecting and freezing on the elevator control system components... airborne warning and control system (AWACS) airplanes; and line numbers 972 through 974. However,...

  18. 77 FR 61731 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-11

    ... repetitive inspections of the in-tank fuel boost pump wiring to detect chafing of the wire insulation... installation of sleeving over the in- tank fuel boost pump wires. The existing AD also requires repetitive... AD would require replacement of the wire bundles for the wing and center fuel boost pumps with...

  19. 77 FR 37781 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-25

    ... the main landing gear to extend without restriction and attempt to lock into position under high... assemblies, which could result in landing gear collapse during touchdown, rollout, or taxi. DATES: This AD is... (ATA) of America Code 32: Main landing gear. (e) Unsafe Condition This AD was prompted by reports...

  20. 78 FR 27315 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-10

    ... pedal assemblies. We are proposing this AD to prevent fracture of the rudder pedal pushrod connecting..., could result in a fracture of the rudder pedal pushrod connecting bolts during pedal use, which could... pedal pushrod connecting bolts in the rudder pedal assembly. We are issuing this AD to prevent...

  1. 77 FR 34881 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-12

    ... this AD to prevent complete fracture of the crown frame assembly, and consequent damage to the skin and... drawings. This condition, if not corrected, could result in complete fracture of the crown frame assembly... left buttock line (LBL) 15.0, station (STA) 320. We are proposing this AD to prevent complete...

  2. 77 FR 6518 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-08

    ... deck. This proposed AD would require replacing the low-pressure oxygen hoses with non-conductive low-pressure oxygen hoses in the flight compartment. We are proposing this AD to prevent electrical current from passing through the low- pressure oxygen hose internal anti-collapse spring, which can cause...

  3. 78 FR 49978 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-16

    ... currently requires repetitive inspections for cracking and corrosion of the aft pressure bulkhead, and... actions if necessary. This proposed AD would also limit corrosion and cracking repairs of the aft pressure... proposing this AD to detect and correct corrosion or cracking of the aft pressure bulkhead, which...

  4. 77 FR 7518 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-13

    ... seals of the blocker doors on the thrust reverser torque boxes are not fireproof. This AD requires a one... reverser torque boxes on the engines, and replacing affected aero/fire seals with new, improved aero/fire... availability of this material at the FAA, call 425-227-1221. Examining the AD Docket You may examine the...

  5. 78 FR 24037 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-24

    ... adding design features to detect electrical faults and to detect a pump running in an empty fuel tank. We... faults, to detect a pump running in an empty fuel tank, and to ensure that a fuel pump's operation is not...), and agreed that the proposed actions will enhance safety. Request To Delay AD Pending Release...

  6. 78 FR 10499 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-14

    ... airplanes. That AD currently requires replacing wiring for the fuel boost pumps and override pumps with new... are issuing this AD to detect and correct damaged wiring for the fuel boost pumps and override pumps... continue to require replacing wiring for the fuel boost pumps and override pumps with new...

  7. 77 FR 72200 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-05

    ... couplings. This AD also requires inspecting the assembly of the engine fuel feed manifold rigid and full... on hot engine parts that could lead to a fire. DATES: This AD is effective December 5, 2012. The... in fuel leaks, which could lead to fuel exhaustion, engine power loss or shutdown, or leaks on...

  8. 77 FR 11789 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-28

    ...-icing system for the angle of attack sensor, the total air temperature, and the pitot probes. We are proposing this AD to prevent ice from forming on air data system sensors and consequent loss of or... receive about this proposed AD. Discussion The air data sensor heating system, when ON, heats the...

  9. 78 FR 64164 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-28

    ... AD requires, as applicable, repetitive high frequency eddy current (HFEC) and low frequency eddy... this AD within the compliance times specified, unless already done. (g) High Frequency Eddy Current (HFEC) and Low Frequency Eddy Current (LFEC) Inspections At the compliance time specified in paragraph...

  10. 78 FR 60804 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-02

    ... fatigue cracking of the aft frame and frame support structure of the forward galley door, which could... frame and frame support structure of the forward galley door. Actions Since AD 2005-07-12, Amendment 39... are issuing this AD to detect and correct fatigue cracking of the aft frame and frame...

  11. 78 FR 22802 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-17

    ... proposed AD would require replacing certain relays and relay sockets, and doing wiring changes. For certain airplanes, this proposed AD would also require installing new relay panels, and removing and installing.... (1) For Model 747-200B, 747-200F, 747-300, and 747SP series airplanes: Replace relays and...

  12. 78 FR 46538 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-01

    ... airplanes. This proposed AD was prompted by reports indicating that a standard fuel tank access door was... locations, and to replace any door with an impact-resistant access door if necessary. This proposed AD also... 5 p.m., Monday through Friday, except Federal holidays. For service information identified in...

  13. 77 FR 42962 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-23

    ... airplanes. This AD was prompted by reports of fatigue cracks in the lap joints, which initiated at scribe... repair if necessary. We are issuing ] this AD to detect and correct such fatigue cracking, which could... reports of fatigue cracks in the lap joints, which initiated at scribe lines that were made...

  14. 77 FR 37770 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-25

    ... airplanes. This AD was prompted by reports of fatigue cracking on the lower main sill inner chord of the..., and repair if necessary. We are issuing this AD to detect and correct fatigue cracking on the lower... prompted by reports of fatigue cracking on the lower main sill inner chord of the hatch opening of...

  15. EDITORIAL: Close contact Close contact

    NASA Astrophysics Data System (ADS)

    Demming, Anna

    2010-07-01

    The development of scanning probe techniques, such as scanning tunnelling microscopy [1], has often been touted as the catalyst for the surge in activity and progress in nanoscale science and technology. Images of nanoscale structural detail have served as an invaluable investigative resource and continue to fascinate with the fantastical reality of an intricate nether world existing all around us, but hidden from view of the naked eye by a disparity in scale. As is so often the case, the invention of the scanning tunnelling microscope heralded far more than just a useful new apparatus, it demonstrated the scope for exploiting the subtleties of electronic contact. The shrinking of electronic devices has been a driving force for research into molecular electronics, in which an understanding of the nature of electronic contact at junctions is crucial. In response, the number of experimental techniques in molecular electronics has increased rapidly in recent years. Scanning tunnelling microscopes have been used to study electron transfer through molecular films on a conducting substrate, and the need to monitor the contact force of scanning tunnelling electrodes led to the use of atomic force microscopy probes coated in a conducting layer as studied by Cui and colleagues in Arizona [2]. In this issue a collaboration of researchers at Delft University and Leiden University in the Netherlands report a new device architecture for the independent mechanical and electrostatic tuning of nanoscale charge transport, which will enable thorough studies of molecular transport in the future [3]. Scanning probes can also be used to pattern surfaces, such as through spatially-localized Suzuki and Heck reactions in chemical scanning probe lithography. Mechanistic aspects of spatially confined Suzuki and Heck chemistry are also reported in this issue by researchers in Oxford [4]. All these developments in molecular electronics fabrication and characterization provide alternative

  16. Strings on AdS wormholes and nonsingular black holes

    NASA Astrophysics Data System (ADS)

    Lü, H.; Vázquez-Poritz, Justin F.; Zhang, Zhibai

    2015-01-01

    Certain AdS black holes in the STU model can be conformally scaled to wormhole and black hole backgrounds which have two asymptotically AdS regions and are completely free of curvature singularities. While there is a delta-function source for the dilaton, classical string probes are not sensitive to this singularity. According to the AdS/CFT correspondence, the dual field theory lives on the union of the disjoint boundaries. For the wormhole background, causal contact exists between the two boundaries and the structure of certain correlation functions is indicative of an interacting phase for which there is a coupling between the degrees of freedom living at each boundary. The nonsingular black hole describes an entangled state in two non-interacting identical conformal field theories. By studying the behavior of open strings on these backgrounds, we extract a number of features of the ‘quarks’ and ‘anti-quarks’ that live in the field theories. In the interacting phase, we find that there is a maximum speed with which the quarks can move without losing energy, beyond which energy is transferred from a quark in one field theory to a quark in the other. We also compute the rate at which moving quarks within entangled states lose energy to the two surrounding plasmas. While a quark-antiquark pair within a single field theory exhibits Coulomb interaction for small separation, a quark in one field theory exhibits spring-like confinement with an anti-quark in the other field theory. For the entangled states, we study how the quark-antiquark screening length depends on temperature and chemical potential.

  17. An AdS Crunch in Supergravity

    NASA Astrophysics Data System (ADS)

    Hertog, Thomas

    2004-12-01

    We review some properties of N=8 gauged supergravity in four dimensions with modified, but AdS invariant boundary conditions on the m2 = -2 scalars. There is a one-parameter class of asymptotic conditions on these fields and the metric components, for which the full AdS symmetry group is preserved. The generators of the asymptotic symmetries are finite, but acquire a contribution from the scalar fields. For a large class of such boundary conditions, we find there exist black holes with scalar hair that are specified by a single conserved charge. Since Schwarschild-AdS is a solution too for all boundary conditions, this provides an example of black hole non-uniqueness. We also show there exist solutions where smooth initial data evolve to a big crunch singularity. This opens up the possibility of using the dual conformal field theory to obtain a fully quantum description of the cosmological singularity, and we report on a preliminary study of this.

  18. 75 FR 8279 - Airworthiness Directives; The Boeing Company Model 747 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-24

    ... considered the following comments on the original NPRM. Request To Revise Costs of Compliance Northwest Airlines requests that we revise the ``Costs of Compliance'' section of the original NPRM to include Boeing's current cost of the modification kit. Northwest Airlines states that the current cost is...

  19. STS-26 crewmembers participate in bench review at offsite Boeing Bldg

    NASA Technical Reports Server (NTRS)

    1988-01-01

    STS-26 Discovery, Orbiter Vehicle (OV) 103, crewmembers participate in bench review at the offsite Boeing Building. Mission Specialist (MS) David C. Hilmers tests an electric razor while MS George D. Nelson reviews clipboard checklist and looks over hygiene supplies (razors, deodorants, tooth paste, etc.). Photograph was taken by Keith Meyers of the NEW YORK TIMES.

  20. STS-26 crewmembers participate in bench review at offsite Boeing Bldg

    NASA Technical Reports Server (NTRS)

    1988-01-01

    STS-26 Discovery, Orbiter Vehicle (OV) 103, crewmembers participate in bench review at the offsite Boeing Building. Left to right Mission Specialist (MS) David C. Hilmers, MS George D. Nelson, Commander Frederick H. Hauck, and Pilot Richard O. Covey, holding clipboards with checklists, look over hygiene supplies (razors, deodorants, tooth paste, etc.). Photograph was taken by Keith Meyers of the NEW YORK TIMES.

  1. The Boeing Company's Manufacturing Technology Student Internship. Evaluation Report (1994-95).

    ERIC Educational Resources Information Center

    Wang, Changhua; Owens, Thomas R.

    An evaluation was conducted of the Boeing Company's summer internship program for students enrolled in a manufacturing technology program after grades 11, 12, and 13 (first year of community college). The evaluation included the following activities: a review of documents describing the internship structure, student selection process, and…

  2. The Boeing Company's Manufacturing Technology Student Internship. Final Evaluation Report for 1996.

    ERIC Educational Resources Information Center

    Owens, Tom

    A study evaluated The Boeing Company's Student Internship Program for students enrolled in a manufacturing technology program. The programs in the Seattle (Washington) and Portland (Oregon) areas provided students with three progressive internship levels offered in the summers of grades 11, 12, and 13 (the first year of community college). The…

  3. The Boeing Company Applied Academics Project Evaluation: Year Four. Evaluation Report.

    ERIC Educational Resources Information Center

    Wang, Changhua; Owens, Thomas R.

    This paper describes fourth-year outcomes (1993-94) of the Boeing Company-funded Applied Academics Project. Since the 1990-91 school year, the company has provided funds to improve and expand applied academics in 60 Washington high schools. Data were collected from pre- and post-surveys of students enrolled in the project's Applied Mathematics…

  4. Boeing--A Case Study Example of Enterprise Project Management from a Learning Organization Perspective.

    ERIC Educational Resources Information Center

    Szymczak, Conrad C.; Walker, Derek H. T.

    2003-01-01

    The evolution of the Boeing Company illustrates how to achieve an enterprise project management culture through organizational learning. Project management can be a survival technique for adapting to change as well as a proactive mechanism. An organizational culture that supports commitment and enthusiasm and a knowledge management infrastructure…

  5. 75 FR 17887 - Airworthiness Directives; The Boeing Company Model 767 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-08

    ... require doing a detailed inspection for foreign objects debris and damage to the wall of the track housing... retracted. This condition, if not corrected, could result in a fuel leak and an increased risk of fire... increased risk of fire. Relevant Service Information We have reviewed Boeing Special Attention...

  6. Boeing’s Integrated Defense Systems Restructuring: Significant and Preventable Cost Impacts to Army Aviation Programs

    DTIC Science & Technology

    2005-03-18

    IDS, the treatment and handling of Boeing World Headquarters (BWHQ) costs, common or shared systems costs, Shared Services Group costs, fringe...these expenses.15 One such example is the addition of the Shared Services Group (SSG) expense to the Mesa and Philadelphia accounting ledgers. Under

  7. 75 FR 39811 - Airworthiness Directives; The Boeing Company Model 777 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-13

    ... slat main track slat cans, which can allow fuel leakage into the fixed wing leading edge in excess of... slat cans, which can allow fuel leakage into the fixed wing leading edge in excess of the capacity of... tracks do not penetrate into the wing fuel tank at these locations. Boeing also states that, for...

  8. 76 FR 12617 - Airworthiness Directives; The Boeing Company Model 777-200 and -300 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-08

    ...-essential electrical systems through a switch in the flight compartment in the event of smoke or flames. In... passenger cabin, a switch is needed in the flight compartment to enable the flightcrew to turn off... two new cabin power control switches. Boeing Service Bulletin 777-24-0074, Revision 1, dated October...

  9. 75 FR 27662 - Special Conditions: Boeing 747-468, Installation of a Medical Lift

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-18

    ... Boeing Model 747-468 airplane is FAA approved under Type Certificate A20WE as a large transport-category..., and equivalent safety findings, which are part of the Model 747-300 certification basis, are also part of the certification basis for the Model 747-400. The special conditions include those enclosed...

  10. The trapped-particle instability in the Boeing 1kW FEL oscillator

    SciTech Connect

    Ramos, L.; Blau, J.; Colson, W.B.

    1995-12-31

    The new design for the Boeing High Average Power Free Electron Laser will operate at 1KW average power (0.63 {mu}m) with a peak current of 132A. Simulations are used to investigate the trapped-particle instability and diffraction effects. Incorporating large desynchronism may prove to be a useful method of controlling the trapped-particle instability.

  11. Allergic Contact Dermatitis

    PubMed Central

    Nelson, Jenny L.

    2010-01-01

    Epicutaneous patch testing is the gold standard method for the diagnosis of allergic contact dermatitis. Despite this knowledge, many clinical dermatologists do not offer patch testing in their offices or offer testing with only a limited number of allergens. Introduced in 1995, the Thin-Layer Rapid Use Epicutaneous Test originally contained 23 allergens and one control. In 2007, five additional allergens were added. This United States Food and Drug Administration-approved patch testing system made patch testing more convenient, and after its introduction, more dermatologists offered patch testing services. However, the number of allergens in the Thin-Layer Rapid Use Epicutaneous Test remains relatively low. Every two years, the North American Contact Dermatitis Group collects and reports the data from patch testing among its members to a standardized series of allergens. In 2005-2006, the Group used a series of 65 allergens. Of the top 30 allergens reported in 2005-2006, 10 were not included in the Thin-Layer Rapid Use Epicutaneous Test. Knowledge of and testing for additional allergens such as these may increase patch testing yield. PMID:20967194

  12. Contact Formation (Hg, CD)Te

    DTIC Science & Technology

    1989-12-01

    AD-A21 7 088 0 a CONTACT FORMATION ON (HG, CD )TE FINAL REPORT W.A. BECK AND G.D. DAVIS V C ELECTE , I DECEMBER 1989 JAN22 1990 U.S. ARMY RESEARCH...27709-2211 I N I 11. TITLE (Include Security Clasification) Contact Formation on (Hg, CD )Te (u) 12. PERSONAL AUTHOR(S) W.A. Beck and G.D. Davis 13a...whereas the 1/f noise of the Au contacts originated at th i/" Cd )Te interface or in the underlying (Hg, Cd )Te, the 1/f noise of the Al contacts orig.L

  13. 77 FR 40481 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-10

    ..., 747-200B, 747- 200C, 747-200F, 747-400F, 747SR, and 747SP series airplanes, without a stretched upper deck or stretched upper deck modification. That AD currently requires repetitive inspections for...

  14. 77 FR 47329 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-08

    ... explosion and consequent loss of the airplane. Since we issued that AD, we have received new data indicating... tanks, which, in combination with flammable fuel vapors, could result in a fuel tank explosion...

  15. 77 FR 65642 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-30

    ... the fuel cross-feel valve is powered by the battery direct current (DC) bus. AAL added that the wing... identification statement to alert maintenance personnel of the importance of regulatory compliance, as well...

  16. 77 FR 60889 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-05

    ... required by paragraph (h)(2) of this AD is done. (ii) Inspection Option 2: Do a one-time external low-frequency eddy current (LFEC) inspection for cracks of the STA 908 upper butt strap. (iii) Inspection...

  17. 78 FR 9 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-02

    ... skin to fracture and fail, and result in rapid decompression of the airplane. DATES: This AD is... and correct fatigue cracking of the fuselage skin, which could cause the fuselage skin to fracture...

  18. 77 FR 71485 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-03

    ... and internal support structure, which could result in uncontrolled decompression of the airplane... issuing this AD to detect and correct cracking in the fuselage skin and internal support structure,...

  19. 78 FR 61173 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-03

    ... update inspection requirements to detect fatigue cracking of principal ] structural elements (PSEs). We are issuing this AD to detect and correct fatigue cracking of various principal structural elements... to require revising the maintenance program to update inspection requirements to detect...

  20. 76 FR 63163 - Airworthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and -300ER Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-12

    ..., -300, and -300ER Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final... Boeing Company Model 777-200, -200LR, -300, and -300ER series airplanes; certificated in any category;...

  1. Full-scale testing, production and cost analysis data for the advanced composite stabilizer for Boeing 737 aircraft, volume 2

    NASA Technical Reports Server (NTRS)

    Aniversario, R. B.; Harvey, S. T.; Mccarty, J. E.; Parson, J. T.; Peterson, D. C.; Pritchett, L. D.; Wilson, D. R.; Wogulis, E. R.

    1982-01-01

    The development, testing, production activities, and associated costs that were required to produce five-and-one-half advanced-composite stabilizer shipsets for Boeing 737 aircraft are defined and discussed.

  2. 75 FR 38394 - Airworthiness Directives; The Boeing Company Model 747-100, -200B, and -200F Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-02

    ... ] trim out all three fastener rows of the overlapping skin common to the lap joint.'' Boeing states that... ``remove'' means to trim out all three fastener rows of the overlapping skin common to the lap...

  3. NASA's Boeing 747 SCA with the Space Shuttle Endeavour on top climbs out after takeoff from Edwards

    NASA Technical Reports Server (NTRS)

    2001-01-01

    NASA's modified Boeing 747 Shuttle Carrier Aircraft with the Space Shuttle Endeavour on top climbs out after takeoff from Edwards Air Force Base on the first leg of its ferry flight back to the Kennedy Space Center in Florida.

  4. AdS3: the NHEK generation

    NASA Astrophysics Data System (ADS)

    Bena, Iosif; Heurtier, Lucien; Puhm, Andrea

    2016-05-01

    It was argued in [1] that the five-dimensional near-horizon extremal Kerr (NHEK) geometry can be embedded in String Theory as the infrared region of an infinite family of non-supersymmetric geometries that have D1, D5, momentum and KK monopole charges. We show that there exists a method to embed these geometries into asymptotically- {AdS}_3× {S}^3/{{Z}}_N solutions, and hence to obtain infinite families of flows whose infrared is NHEK. This indicates that the CFT dual to the NHEK geometry is the IR fixed point of a Renormalization Group flow from a known local UV CFT and opens the door to its explicit construction.

  5. 78 FR 56182 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-12

    ... the potential for an electrical current to flow through certain motor-operated shutoff valve actuators... if certain motor-operated shutoff valve actuators for the fuel tanks are installed, and related... Jersey Avenue SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Rebel Nichols,...

  6. 78 FR 42720 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-17

    ... airplane reaching its limit of validity (LOV) of the engineering data that support the established... personal information you provide. We will also post a report summarizing each substantive verbal contact we... element of those initiatives is the requirement to establish a limit of validity (LOV) of the...

  7. 77 FR 5386 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-03

    .... FOR FURTHER INFORMATION CONTACT: Nenita Odesa, Aerospace Engineer, Airframe Branch, ANM-120L, FAA, Los...: (562) 627-5234; fax: (562) 627-5210; email: nenita.odesa@faa.gov . ] SUPPLEMENTARY INFORMATION...: Nenita Odesa, Aerospace Engineer, Airframe Branch, ANM-120L, FAA, Los Angeles ACO, 3960...

  8. 78 FR 25905 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-03

    ... (ACO), 3960 Paramount Boulevard, Lakewood, California 90712- 4137; phone: (562) 627-5239; fax: (562... provide. We will also post a report summarizing each substantive verbal contact we receive about this... engineering data that support the structural maintenance program. Operators affected by the WFD rule may...

  9. AdS2 holographic dictionary

    NASA Astrophysics Data System (ADS)

    Cvetič, Mirjam; Papadimitriou, Ioannis

    2016-12-01

    We construct the holographic dictionary for both running and constant dilaton solutions of the two dimensional Einstein-Maxwell-Dilaton theory that is obtained by a circle reduction from Einstein-Hilbert gravity with negative cosmological constant in three dimensions. This specific model ensures that the dual theory has a well defined ultraviolet completion in terms of a two dimensional conformal field theory, but our results apply qualitatively to a wider class of two dimensional dilaton gravity theories. For each type of solutions we perform holographic renormalization, compute the exact renormalized one-point functions in the presence of arbitrary sources, and derive the asymptotic symmetries and the corresponding conserved charges. In both cases we find that the scalar operator dual to the dilaton plays a crucial role in the description of the dynamics. Its source gives rise to a matter conformal anomaly for the running dilaton solutions, while its expectation value is the only non trivial observable for constant dilaton solutions. The role of this operator has been largely overlooked in the literature. We further show that the only non trivial conserved charges for running dilaton solutions are the mass and the electric charge, while for constant dilaton solutions only the electric charge is non zero. However, by uplifting the solutions to three dimensions we show that constant dilaton solutions can support non trivial extended symmetry algebras, including the one found by Compère, Song and Strominger [1], in agreement with the results of Castro and Song [2]. Finally, we demonstrate that any solution of this specific dilaton gravity model can be uplifted to a family of asymptotically AdS2 × S 2 or conformally AdS2 × S 2 solutions of the STU model in four dimensions, including non extremal black holes. The four dimensional solutions obtained by uplifting the running dilaton solutions coincide with the so called `subtracted geometries', while those obtained

  10. Contact Lens Risks

    MedlinePlus

    ... Health and Consumer Devices Consumer Products Contact Lenses Contact Lens Risks Share Tweet Linkedin Pin it More ... redness blurred vision swelling pain Serious Hazards of Contact Lenses Symptoms of eye irritation can indicate a ...

  11. Contact Lens Care

    MedlinePlus

    ... For Consumers Consumer Information by Audience For Women Contact Lens Care Share Tweet Linkedin Pin it More ... 1088, www.fda.gov/medwatch Learn More about Contact Lens Care Other Tips on Contact Lenses Decorative ...

  12. Simultaneous cabin and ambient ozone measurements on two Boeing 747 airplanes. Volume 3: October 1978 - July 1979

    NASA Technical Reports Server (NTRS)

    Holdeman, J. D.; Jasperson, W. H.

    1985-01-01

    Measurements of ozone concentrations at cruise altitudes both outside and in the cabin of a Boeing 747SP and Boeing 747-100 airliners in routine commercial service are presented. Plotted and tabulated data are identified by route and are arranged chronologically for each airplane. These data were taken at 5- or 10-min intervals by automated instruments used in the NASA Global Atmospheric Sampling Program (GASP). All GASP cabin ozone data obtained from October 1978 to early July 1979 are presented.

  13. Plan, formulate, discuss and correlate a NASTRAN finite element vibrations model of the Boeing Model 360 helicopter airframe

    NASA Technical Reports Server (NTRS)

    Gabel, R.; Lang, P. F.; Smith, L. A.; Reed, D. A.

    1989-01-01

    Boeing Helicopter, together with other United States helicopter manufacturers, participated in a finite element applications program to emplace in the United States a superior capability to utilize finite element analysis models in support of helicopter airframe design. The activities relating to planning and creating a finite element vibrations model of the Boeing Model 36-0 composite airframe are summarized, along with the subsequent analytical correlation with ground shake test data.

  14. 77 FR 47267 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-08

    ... Model 747-200B series airplanes having a stretched upper deck. The existing AD currently requires...-300, 747-400, and 747-400D series airplanes; and Model 747-200B series airplanes having a stretched..., and 747-400D series airplanes; and Model 747-200B series airplanes having a stretched upper...

  15. 77 FR 70357 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-26

    ... by a report of a broken drain tube assembly on the left engine strut at the clamp support location... support clamps on the aft fairing of the engine struts. This new AD requires replacing the drain tube assembly of the left and right engine strut aft fairings with a new one, which includes an integral...

  16. 78 FR 58970 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-25

    ... flight deck display units resulting in blanking, blurring, or loss of color on the display. This proposed... airplanes reported flight deck display unit malfunctions including blanking, blurring, or loss of color... units resulting in blanking, blurring, or loss of color on the display. We are issuing this AD...

  17. 77 FR 10406 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-22

    ... deactivation pin. This proposed AD would add a dye penetrant inspection for cracking of the rivet holes of the... a dye penetrant inspection for cracking of the rivet holes of the bushing plate; repair or... Alert Service Bulletin 767-78A0089, Revision 5, dated June 9, 2009, do a dye penetrant inspection...

  18. 78 FR 72836 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-04

    ... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM... airplanes. This proposed AD was prompted by multiple reports of cracking in the overwing frames. This... adjacent structure and consequent loss of structural integrity of the airplane. DATES: We must...

  19. 77 FR 46343 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-03

    ... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM...-400D, 747-400F, 747SR, and 747SP series airplanes; and certain Model 757-200, -200PF, and -300 series airplanes. The existing AD currently requires replacing the control switches of the forward, aft, and...

  20. 77 FR 58330 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-20

    ... elevator tab control mechanism, which could result in severe elevator and tab vibration. Consequent... elevator vibration. That AD also was prompted by reports of gaps in elevator tab control mechanisms and... mechanism, which could result in elevator and tab vibration. Consequent structural failure of the...

  1. 77 FR 65613 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-30

    ... report of an abnormal airframe vibration in the aft fuselage during flight. We are issuing this AD to prevent excessive freeplay in the rudder control surface, which could cause rudder vibration, and result...: Discussion We have received a report of an abnormal airframe vibration in the aft fuselage during flight....

  2. 78 FR 58487 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-24

    ... system installations. The phase 3 DUs provide primary flight information including airspeed, altitude..., Aerospace Engineer, Systems and Equipment Branch, ANM-130S, Seattle Aircraft Certification Office, FAA, 1601.... Discussion This proposed AD resulted from instrumented testing on Model 737 series airplanes that...

  3. 78 FR 40060 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-03

    ... currently requires repetitive inspections to detect cracks of the outer V-blades of the thrust reverser, and... repetitive inspections. Since we issued that AD, we have received reports of cracked outer V-blade fittings... action is done, repetitive inspections for cracking in the outer V-blade fittings of the hinge beam...

  4. 77 FR 18137 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-27

    ...), latch pin migration, and broken latch pin fittings. This proposed AD would require various repetitive... cargo door latch mechanism and/or the lower sill structure. The migration of two or more latch pins and... determine if the bolt is broken; and checking the latch pin for migration and, if necessary, a...

  5. 78 FR 58982 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-25

    ... inspecting to determine the part number of the attach pins of the horizontal stabilizer rear spar, and replacing certain attach pins. Since we issued AD 2013-07-07, we received inquiries from affected operators regarding the parts installation limitation and prohibition, and re-installation of certain attach pins...

  6. 78 FR 59293 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-26

    ... satellite communication (SATCOM) antenna adapter. This proposed AD would require repetitive inspections of... SATCOM antenna adapter. During a maintenance planning data inspection, one operator reported a 16-inch crack under the 3-bay SATCOM antenna adapter plate in the crown skin of the fuselage on an airplane...

  7. 77 FR 21426 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-10

    .... This AD requires repetitive general visual inspections for broken or missing latch pins of the lower..., 2011 (76 FR 54405). That NPRM proposed to require repetitive general visual inspections for broken or... visual inspections of the entire door. The inspections required by this final rule include...

  8. 78 FR 65171 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-31

    ... conversion. This AD requires doing a general visual inspection of the station 1920 splice clip for correct... visual inspection of the station 1920 splice clip for correct fastener installation, and related..., 2012: Do a general visual inspection for correct installation of the station 1920 splice clip common...

  9. 77 FR 71731 - Airworthiness Directives; The Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-04

    ... found in the strut forward dry bay. This proposed AD would require repetitive general visual inspections... repetitive general visual inspections for hydraulic fluid contamination of the strut forward dry bay, and... Cost on U.S. operators Repetitive general visual 5 work-hours x $85 per hour $0 $425 per inspection...

  10. 78 FR 19093 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-29

    ... slide/raft packboard release mechanisms. This AD requires doing a general visual inspection of the... to require doing a general visual inspection of the housing assembly of the packboard release..., January 19, 2012), which defined a general visual inspection, to new paragraph (i) in the regulatory...

  11. 78 FR 49903 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-16

    ... Federal Regulations is sold by the Superintendent of Documents. #0;Prices of new books are listed in the... cracking on the door on the other side of the airplane. Southwest added that, for a door that has no... surface high frequency eddy current (HFEC) inspection for cracking of the left- and right-side inboard...

  12. 78 FR 49906 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-16

    ... by a report of cracking in the left-side chord of the fin closure rib on the vertical stabilizer... cracking and corrosion, and related investigative and corrective actions if necessary. We are issuing this AD to detect and correct cracking and corrosion in the left- and right-side chords of the fin...

  13. 78 FR 14469 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-06

    ... inspections to find cracking of the web, strap, inner chords, inner chord angle of the forward edge frame of... necessary; and repetitive inspections for cracking of repairs. Since we issued that AD, we have received multiple reports of cracking outside of the previous fuselage inspection areas and a report of a crack...

  14. 77 FR 36222 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-18

    ... of an inboard main landing gear (MLG) door assembly departure due to premature fatigue cracking in... cracking of the inboard MLG door hinge fittings; and modification of cracked fittings, which would terminate the repetitive inspections. We are proposing this AD to detect and correct fatigue cracking in...

  15. 77 FR 36143 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-18

    ... prompted by reports of cracks found on the center section ribs of the horizontal stabilizers. This AD requires repetitive inspections for cracking of the aft face of the left and right rib hinge bearing lugs of the center ] section of the horizontal stabilizer; and crack measurement, repairs,...

  16. 77 FR 28240 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-14

    ... airplanes. This AD was ] prompted by reports of multiple site damage cracks in the radial web lap and tear... repetitive inspections for cracking of the aft pressure bulkhead at STA 1582, repair or replacement of any cracked bulkhead, and eventual replacement of the aft pressure bulkhead at STA 1582 with a new...

  17. 78 FR 21276 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-10

    ... nuts might have been over-torqued. Over-torqued nuts are at risk of fracture. Fractured nuts could... fractures could lead to additional nut or bolt fractures within that support rib, and these additional fractures could cause the joint to be compromised. We are proposing this AD to detect and correct...

  18. 77 FR 50407 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-21

    ... modification of the outboard radius of the lower corners of the door frame and reinforcement of the cross beam... inspections. Since we issued that AD, we have received additional reports of fatigue cracking in the radius of... radius of the lower corners of the door frame and reinforcement of the cross beam of the forward...

  19. 76 FR 81879 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-29

    ... radius of the chord on several airplanes. This action revises the original NPRM by reducing certain... number 1 upper main sill outer chord, along the bend radius of the chord, which could result in loss of... chord, along the bend radius of the chord on several airplanes. We are issuing this AD to detect...

  20. 78 FR 12991 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-26

    ... Company Model 767 airplanes. One AD currently requires a functional check of the shear rivets in all six elevator power control actuator (PCA) bellcrank assemblies to determine the condition of the shear rivets... to prevent continued operation with yielded or failed shear rivets in the elevator PCA...

  1. 78 FR 23694 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-22

    ... airplanes. This proposed AD was prompted by a report of a broken forward support fitting at the inboard... fitting assemblies of the inboard track of the left and right inboard flaps for cracking, and corrective... fitting assembly, which could result in loss of inboard flap control and subsequent loss of...

  2. 78 FR 14731 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-07

    ... outboard flange of the longeron extension fittings, which attach to the wing-to- body fairing support frame. This proposed AD would require repetitive inspections of the longeron extension fittings for cracking... longeron extension fittings, which can become large and adversely affect the structural integrity of...

  3. 77 FR 33619 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-07

    ... -400ER series airplanes. That AD currently requires replacing the separation link assembly on the applicable entry and service doors with an improved separation link assembly, and doing related investigative... replacing the separation link assembly on the applicable entry and service doors with an improved...

  4. 77 FR 58334 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-20

    ... separation between the wire bundle and the hydraulic tubing in the main landing gear (MLG) wheel well. This... applicable. We are proposing this AD to detect and correct possible damage caused by insufficient separation... condition was caused by inadequate separation between the wire bundle and the hydraulic line....

  5. 78 FR 60676 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-02

    ... reports of worn or incorrectly assembled latches on main deck escape slides installed on airplane doors... (78 FR 9346). The NPRM proposed to require determining if the latches on main deck escape slides... after the effective date of this AD: Determine if the latches in the main deck escape slide/rafts...

  6. 77 FR 63266 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-16

    ..., reinforcement straps were not bonded to the center overhead stowage bins in the passenger compartment. For certain airplanes, this proposed AD would require performing an inspection of reinforcement straps to ensure they are correctly bonded to the center overhead stowage bins, and bonding the...

  7. 78 FR 25377 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-01

    ... and -900ER series airplanes. This AD was prompted by a report of leaking fuel from the wing leading... drain path in the wing leading edge area, forward of the wing front spar, and doing all applicable... wing leading edge, and draining inboard and onto the engine exhaust nozzle, which could result in...

  8. 76 FR 78574 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-19

    ... underwing longeron fittings in the wing center section which could result in loss of the primary load path between the fuselage and the wing box, and consequent catastrophic damage to the wing box and failure of the wing. This proposed AD would require repetitive high frequency eddy current (HFEC) inspections...

  9. 78 FR 25662 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-02

    ... and right side chords of the fin closure rib for cracking and corrosion, and related investigative and corrective actions if necessary. We are proposing this AD to detect and correct cracking and corrosion in the... corrosion caused by the material properties of 2024-T351 extrusion from which the closure rib chord is...

  10. 77 FR 60891 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-05

    ...) beam outboard end fittings for corrosion, and rework if necessary; and ultrasonic inspections for... beams for cracks and corrosion, and corrective actions if necessary. This AD was prompted by new reports of corrosion damage to the end fittings of the WLG support beams, and one report of...

  11. 78 FR 63903 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-25

    ... corrosion on bonding jumpers installed on the flight control surfaces. This proposed AD would require repetitive bonding jumper inspections for corrosion, sealant disbond, and insufficient sealant coverage, and... for corrosion damage of the bonding brackets, and corrective actions if necessary, which...

  12. 77 FR 12170 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-29

    ... corrosion and cracking in this area, and corrective actions if necessary. We are issuing this AD to detect and correct such corrosion and cracking, which, if not corrected, could grow and result in structural... proposed to require repetitive inspections for corrosion and cracking in the front spar lower chord at...

  13. 78 FR 57053 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-17

    ... chords, inner chord angle of the forward edge frame of the number 5 main entry door cutouts; the frame... issuing this AD to detect and correct such cracks, which could cause damage to the adjacent body structure... chords, inner chord angle of the forward edge frame of the number 5 main entry door cutouts; the...

  14. 77 FR 731 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-06

    ... (HSTA). This AD requires repetitive inspections, lubrications, and repetitive overhauls of the ball nut..., lubrications, and repetitive repairs/overhauls of the ball nut and ballscrew and attachment (Gimbal) fittings...,940 per inspection cycle. Lubrications 1 or 3 85 None $85 or $255, per 1,641 Between...

  15. 78 FR 60670 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-02

    ... cracking at the aft upper corner of the main entry door (MED) 5 cutout. This AD requires inspecting for the... of the door cutout, inspecting for any cracking of the fuselage skin assembly and bear strap in the aft upper corner area of the door cutout, and repairing or modifying the fuselage skin assembly...

  16. 78 FR 78701 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-27

    ... bonding resistance measurements, and changing the GFI relay position. This AD also requires revising the..., installing ground studs and a bonding jumper, doing certain bonding resistance measurements, and changing the... panel, the required bonding resistance measurements cannot be obtained. In addition, ANA requested...

  17. 77 FR 20505 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-05

    ... ground fault interrupter (GFI) feature. This AD also requires an electrical bonding resistance... bonding resistance measurement for certain GFI relays to verify that certain bonding requirements are met.... Inspection of screw 1 work-hour x $85 $0 $85 $59,160. installation and bonding per hour = $85....

  18. 77 FR 49396 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-16

    ... option for installing a redesigned aft hinge fitting with the trim already done, instead of trimming an... installing a redesigned aft hinge fitting with the trim already done, instead of trimming an existing or new... action in the existing AD) for installing a redesigned aft hinge fitting designed with the trim...

  19. 77 FR 20511 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-05

    ..., measuring the electrical conductivity on the aluminum upper compression pads 2 and 3 as applicable... Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket... the Docket Office (phone: 800-647-5527) is Document Management Facility, U.S. Department...

  20. 76 FR 77371 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-13

    ... ensure that a fuel filter impending bypass condition due to gross fuel contamination is detected in a... prevents the display of an advisory message to the flightcrew of a left engine fuel filter contamination... malfunction event due to fuel contamination. We are issuing this AD to correct the unsafe condition on...

  1. 78 FR 72791 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-04

    ... inspections of the in-tank fuel boost pump wiring, installation of sleeving over the in-tank fuel boost pump... also requires replacement of the wire bundles for the wing and center fuel boost pumps, installation of... cracking, and repair if necessary. This new AD also requires revising the maintenance program...

  2. 77 FR 54793 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-06

    ... maintenance action after landing to safely restart the pump. We have not changed the final rule regarding this... latched off until the fault is cleared through maintenance action and verified that the pump and the... detect a pump running in an empty fuel tank. We are issuing this AD to reduce the potential of...

  3. 77 FR 2442 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-18

    ... maintenance program to incorporate Airworthiness Limitations (AWLs) No. 28-AWL-27 and No. 28-AWL-28. This AD... requires an alternative functional test for the left and right override/jettison pumps. We are issuing this... dry operation of the main tank boost pumps and center auxiliary tank override and jettison pumps....

  4. 78 FR 49229 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-13

    ... corrosion cracking of the forward trunnion pins, which could result in fracture of the pins and consequent... prevent stress corrosion cracking of the forward trunnion pins, which could result in fracture of the pins... AD to prevent stress corrosion cracking of the forward trunnion pins, which could result in...

  5. 77 FR 24643 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-25

    ... airplanes. This proposed AD was prompted by a report of in-flight fracture of the right windshield (window 1... the fracture of the inner pane of the first officer's windshield (right window 1). This windshield fracture resulted in total loss of the first officer's outside visibility and small shards of...

  6. 78 FR 17294 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-21

    ... -300ER series airplanes. This AD was prompted by reports of in-service events related to electrical power system malfunctions resulting in damage to electrical load management system (ELMS) P200 and P300 power..., Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207;...

  7. 77 FR 60296 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-03

    ... lack of oxygen in the body), and consequent loss of control of the airplane. DATES: This AD is... incapacitation of the flightcrew due to hypoxia (a lack of oxygen in the body), and consequent loss of control of... oxygen in the body), and consequent loss of control of the airplane. (f) Compliance Comply with this...

  8. 78 FR 23110 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-18

    ..., -300ER, and 777F series airplanes. This AD was prompted by a report that during a test of the oxygen system, an operator found that the passenger oxygen masks did not properly flow oxygen, and that a loud... inspection of certain areas of the airplane oxygen system to ensure clamshell couplers are installed...

  9. 77 FR 41045 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-12

    ... low-pressure oxygen hoses with non-conductive low-pressure oxygen hoses in the flight compartment. We are issuing this AD to prevent electrical current from passing through the low-pressure oxygen hose internal anti-collapse spring, which can cause the low-pressure oxygen hose to melt or burn, and...

  10. 78 FR 42900 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-18

    ... well pressure floor and a preventive modification or permanent repair, as applicable. We are proposing this AD to prevent cracking in the main wheel well pressure floor, which could result in reduced... the ends of the pressure floor reinforcing beads at stations 930 and 940 in the main wheel well....

  11. 77 FR 58325 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-20

    ... switch if necessary. We are proposing this AD to prevent power from being supplied to passenger seats when the entertainment control switch is in the OFF position, which could cause an electrical shock... terminator. The airplane manufacturer found that the entertainment control switch has no effect on...

  12. 78 FR 4055 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-18

    ... doing certain wiring changes of the entertainment control switch. We are issuing this AD to prevent power from being supplied to passenger seats when the entertainment control switch is in the OFF... of the entertainment control switch if necessary. Comments We gave the public the opportunity...

  13. 78 FR 25898 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-03

    ... address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service... Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket... September 9, 2010, have a unique configuration at the S-6 lap splice in Section 41. This configuration...

  14. 78 FR 18922 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-28

    ... the availability of this material at the FAA, call 425-227-1221. Examining the AD Docket You may... Labor cost Parts cost Cost per product operators Inspection/Torque/Measurement... 3 work-hours x $85 $0... Torque, Latch Pin Measurement, Bolt Replacement, and Rigging At the applicable times specified in table...

  15. 77 FR 64704 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-23

    ... of two in-service occurrences on Model 737-400 airplanes of total loss of boost pump pressure of the... fuel system, which, in the event of total loss of the fuel boost pumps, could result in dual engine... that air safety and the public interest require adopting the AD as proposed. Costs of Compliance...

  16. 77 FR 40307 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-09

    ... June 6, 2008 (73 FR 32248). That NPRM proposed to require performing repetitive operational tests of....'' Lufthansa stated that it is performing the operational test at a 1-D interval that corresponds to up to 33... Actions Within 30,000 flight hours after the effective date of this AD: Perform an operational test of...

  17. 77 FR 41041 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-12

    .... GKN pointed out that the primary cause of arcing that leads to high temperatures is the melting of the... caused by a loose terminal exceeds the rated melting point of the solder, resulting in high voltage...: Ice and rain protection. (e) Unsafe Condition This AD was prompted by several reports of...

  18. 77 FR 12506 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-01

    ... (FQIS) wiring or fuel tank systems to prevent development of an ignition source inside the center fuel tank. We are proposing this AD to prevent ignition sources inside the center fuel tank, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of...

  19. 77 FR 43547 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-25

    .... This proposed AD would require repetitive detailed and high frequency eddy current inspections for... service information describes procedures for repetitive detailed and high frequency eddy current (HFEC...: Do detailed and high frequency eddy current (HFEC) inspections of the skin for cracking in the...

  20. 77 FR 66757 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-07

    ... requires a one-time mid-frequency eddy current (MFEC) inspection, a low frequency eddy current (LFEC... AD would instead require repetitive external eddy current inspections for cracking of certain fuselage crown lap joints and corrective actions; internal eddy current and detailed inspections...

  1. 78 FR 27001 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-09

    ..., -400, and - 500 series airplanes. That AD currently requires a one-time mid- frequency eddy current (MFEC) inspection, a low-frequency eddy current (LFEC) inspection, and a detailed inspection for damage... external eddy current inspections for cracking of certain fuselage crown lap joints, and corrective...

  2. 77 FR 37793 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-25

    ... ceiling support structure of Section 41, in airplanes incorporating the overhead space utilization (OSU... ceiling support structure. We are issuing this AD to prevent the forward lowered ceiling panels and support structure from becoming dislodged during a 9.0 g forward load and consequent injury to...

  3. 77 FR 9518 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-17

    ... airplanes. This AD was prompted by reports of loss of avionics cooling due to an unserviceable relay... requires doing certain wiring changes, installing a new relay and necessary wiring in the CACTCS, and... to require doing certain wiring changes, installing a new relay and necessary wiring in the...

  4. 77 FR 76230 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-27

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a..., and -900ER series airplanes. This AD was prompted by reports of escape slides failing to deploy...

  5. 77 FR 22686 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-17

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION... Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM...-500 series airplanes. This proposed AD was prompted by reports of chem-mill step cracking on the...

  6. 77 FR 58791 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-24

    ... require revising the maintenance program to update inspection requirements to ] detect fatigue cracking of principal structural elements (PSEs). We are proposing this AD to detect and correct fatigue cracking of... additional analyses of fatigue cracking of PSEs on certain Model 737 airplanes, which included: Crack...

  7. Contact Lenses for Vision Correction

    MedlinePlus

    ... Ophthalmologist Patient Stories Español Eye Health / Glasses & Contacts Contact Lenses Sections Contact Lenses for Vision Correction Proper ... to Know About Contact Lenses Colored Contact Lenses Contact Lenses for Vision Correction Written by: Kierstan Boyd ...

  8. Data Mining of NASA Boeing 737 Flight Data: Frequency Analysis of In-Flight Recorded Data

    NASA Technical Reports Server (NTRS)

    Butterfield, Ansel J.

    2001-01-01

    Data recorded during flights of the NASA Trailblazer Boeing 737 have been analyzed to ascertain the presence of aircraft structural responses from various excitations such as the engine, aerodynamic effects, wind gusts, and control system operations. The NASA Trailblazer Boeing 737 was chosen as a focus of the study because of a large quantity of its flight data records. The goal of this study was to determine if any aircraft structural characteristics could be identified from flight data collected for measuring non-structural phenomena. A number of such data were examined for spatial and frequency correlation as a means of discovering hidden knowledge of the dynamic behavior of the aircraft. Data recorded from on-board dynamic sensors over a range of flight conditions showed consistently appearing frequencies. Those frequencies were attributed to aircraft structural vibrations.

  9. STS-26 crewmembers participate in bench review at offsite Boeing Bldg

    NASA Technical Reports Server (NTRS)

    1988-01-01

    STS-26 Discovery, Orbiter Vehicle (OV) 103, crewmembers participate in bench review at the offsite Boeing Building. Commander Frederick H. Hauck reviews a checklist of necessary supplies with Flight Equipment Processing engineer Laura E. Duvall. Pilot Richard O. Covey makes notations on checklist in background. Hygiene supplies (razors, deodorants, brushes, combs, etc.) are displayed on table behind Hauck. Photograph was taken by Keith Meyers of the NEW YORK TIMES.

  10. STS-26 crewmembers participate in bench review at offsite Boeing Bldg

    NASA Technical Reports Server (NTRS)

    1988-01-01

    STS-26 Discovery, Orbiter Vehicle (OV) 103, crewmembers participate in bench review at the offsite Boeing Building. Left to right Mission Specialist (MS) David C. Hilmers, MS George D. Nelson, Commander Frederick H. Hauck, and Pilot Richard O. Covey, holding clipboards with checklists, look over hygiene supplies (razors, deodorants, tooth paste, etc.). Flight Equipment Processing engineer Laura E. Duvall, standing behind crew members, waits to lend a hand in the 'shopping spree'. Photograph was taken by Keith Meyers of the NEW YORK TIMES.

  11. Advanced composite elevator for Boeing 727 aircraft. Volume 1: Technical summary

    NASA Technical Reports Server (NTRS)

    Chovil, D. V.; Harvey, S. T.; Mccarty, J. E.; Desper, O. E.; Jamison, E. S.; Syder, H.

    1981-01-01

    The design, development, analysis, and testing activities and results that were required to produce five and one-half shipsets of advanced composite elevators for Boeing 727 aircraft are summarized. During the preliminary design period, alternative concepts were developed. After selection of the best design, detail design and basic configuration improvements were evaluated. Five and one-half shipsets were manufactured. All program goals (except competitive cost demonstration) were accomplished when our design met or exceeded all requirements, criteria, and objectives.

  12. 76 FR 19278 - Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-07

    ... could also result in crew communication difficulties or incapacitation of the crew. DATES: We must... substantive verbal contact we receive about this proposed AD. Discussion On July 18, 2007, we issued AD 2007... could also result in crew communication difficulties or incapacitation of the crew. Actions...

  13. Using binary optical elements (BOEs) to generate rectangular spots for illumination in micro flow cytometer

    PubMed Central

    Zhao, Jingjing; You, Zheng

    2016-01-01

    This work introduces three rectangular quasi-flat-top spots, which are provided by binary optical elements (BOEs) and utilized for the illumination in a microflow cytometer. The three spots contain, respectively, one, two, and three rectangles (R1, R2, and R3). To test the performance of this mechanism, a microflow cytometer is established by integrating the BOEs and a three-dimensional hydrodynamic focusing chip. Through the experiments of detecting fluorescence microbeads, the three spots present good fluorescence coefficients of variation in comparison with those derived from commercial instruments. Benefiting from a high spatial resolution, when using R1 spot, the micro flow cytometer can perform a throughput as high as 20 000 events per second (eps). Illuminated by R2 or R3 spot, one bead emits fluorescence twice or thrice, thus the velocity can be measured in real time. Besides, the R3 spot provides a long-time exposure, which is conducive to improving fluorescence intensity and the measurement stability. In brief, using the spots shaped and homogenized by BOEs for illumination can increase the performance and the functionality of a micro flow cytometer. PMID:27733892

  14. Boeing turns over P6 ITS to NASA and commander of STS-97

    NASA Technical Reports Server (NTRS)

    2000-01-01

    Boeing workers officially turn over the P6 Integrated Truss Structure to the NASA shuttle integration team in a ceremony in the Space Station Processing Facility. A symbolic key will be presented to Brent Jett (at left), commander on mission STS-97, which is taking the P6 to the International Space Station. Next to Jett are (left to right) Bill Dowdell, mission manager; Mark Sorensen, outboard truss cargo element manager for Boeing; and John Elbon, Boeing ISS director of ground operations at KSC. Among the attendees at left watching the ceremony are other STS- 97 crew members (in uniform, from left) Mission Specialists Joe Tanner and Carlos Noriega and Pilot Mike Bloomfield. Mission STS- 97is the sixth construction flight to the International Space Station. Its payload includes a photovoltaic (PV) module, with giant solar arrays that will provide power to the Station. The mission involves two spacewalks to complete the solar array connections. STS-97 is scheduled to launch Nov. 30 at 10:05 p.m. EST.

  15. AD(H)D.

    PubMed

    Harrison, Christopher; Charles, Janice; Britt, Helena

    2008-06-01

    The BEACH program (Bettering the Evaluation and Care of Health) shows that management of attention deficit (hyperactivity) disorder (AD(H)D) was rare in general practice, occurring only six times per 1,000 encounters with children aged 5-17 years, between April 2000 and December 2007. This suggests that general practitioners manage AD(H)D about 46,000 times for this age group nationally each year.

  16. ADS pilot program Plan

    NASA Technical Reports Server (NTRS)

    Clauson, J.; Heuser, J.

    1981-01-01

    The Applications Data Service (ADS) is a system based on an electronic data communications network which will permit scientists to share the data stored in data bases at universities and at government and private installations. It is designed to allow users to readily locate and access high quality, timely data from multiple sources. The ADS Pilot program objectives and the current plans for accomplishing those objectives are described.

  17. Specific Contact Resistance Measurements of Ohmic Contacts to Diamond

    DTIC Science & Technology

    1991-01-01

    AD-A262 818 a.vi tm te (11o ckiaa AGENCY USE CNLY re.j. b"IAI 2 REPORT DATS 3 i4 ý’ * : ..... .. February 1993 l , qf-r 4 T71 a AND SUBT’LE. SPECIFIC...rectify rnq and :1 i diamondi tl- ’o *been reported in the- literature 1-I paper measurements, of the specitic conatact inccc o.f ohmic ln tacts to...conducting layer. The contact resistance in these struc- tures is analyzed using the transmission line model [15. The primary drawback to

  18. AD-1 multiple exposure showing wing sweep

    NASA Technical Reports Server (NTRS)

    1980-01-01

    flight on August 7, 1982, was NASA Research Pilot Thomas C. McMurtry. The AD-1 flew a total of 79 times during the research program. The aircraft was constructed by the Ames Industrial Co., Bohemia, NY, under a $240, 000 fixed-price contract. NASA specified the design based on a geometric configuration provided by the Boeing company. The Rutan Aircraft Factory, Mojave, CA, provided the detailed design and loads analysis for the vehicle. The aircraft was 38.8 feet long and 6.75 feet high with a wing span of 32.3 feet, unswept. It was constructed of plastic reinforced with fiberglass and weighed 1,450 pounds,empty. The vehicle was powered by two small turbojet engines, each producing 220 pounds of thrust at sea level. Due to safety concerns, the aircraft was limited to speeds of 170 mph.

  19. Contact dermatitis caused by preservatives.

    PubMed

    Yim, Elizabeth; Baquerizo Nole, Katherine L; Tosti, Antonella

    2014-01-01

    Preservatives are biocidal chemicals added to food, cosmetics, and industrial products to prevent the growth of microorganisms. They are usually nontoxic and inexpensive and have a long shelf life. Unfortunately, they commonly cause contact dermatitis. This article reviews the most important classes of preservatives physicians are most likely to encounter in their daily practice, specifically isothiazolinones, formaldehyde and formaldehyde-releasers, iodopropynyl butylcarbamate, methyldibromoglutaronitrile, and parabens. For each preservative mentioned, the prevalence of sensitization, clinical presentation of contact dermatitis, patch testing concentrations, cross reactions, and related legislation will be discussed. Mandatory labeling of preservatives is required in some countries, but not required in others. Until policies are made, physicians and patients must be proactive in identifying potential sensitizers and removing their use. We hope that this article will serve as a guide for policy makers in creating legislation and future regulations on the use and concentration of certain preservatives in cosmetics and industrial products.

  20. Contact Us about Asbestos

    EPA Pesticide Factsheets

    How to contact EPA for more information on asbestos, including state and regional contacts, EPA’s Asbestos Abatement/Management Ombudsman and the Toxic Substances Control Act (TSCA) Assistance Information Service (TSCA Hotline).

  1. Colored Contact Lens Dangers

    MedlinePlus

    ... Halloween Hazard: The Hidden Dangers of Buying Decorative Contact Lenses Without a Prescription Sep. 26, 2013 It ... the truth." Real People, Real Problems with Colored Contact Lenses Julian: Teenager Blinded In One Eye By ...

  2. Contact sensitization to Compositae mix in children.

    PubMed

    Belloni Fortina, Anna; Romano, Ilaria; Peserico, Andrea

    2005-11-01

    The prevalence of contact sensitization to Compositae mix was investigated in 641 consecutive children. Seventeen children (12 with atopic dermatitis) tested positive for Compositae mix. We suggest adding Compositae mix to a pediatric screening series when investigating airborne dermatitis in children with atopic dermatitis.

  3. Adding and Deleting Images

    EPA Pesticide Factsheets

    Images are added via the Drupal WebCMS Editor. Once an image is uploaded onto a page, it is available via the Library and your files. You can edit the metadata, delete the image permanently, and/or replace images on the Files tab.

  4. What Value "Value Added"?

    ERIC Educational Resources Information Center

    Richards, Andrew

    2015-01-01

    Two quantitative measures of school performance are currently used, the average points score (APS) at Key Stage 2 and value-added (VA), which measures the rate of academic improvement between Key Stage 1 and 2. These figures are used by parents and the Office for Standards in Education to make judgements and comparisons. However, simple…

  5. Contact Lenses on Submarines

    DTIC Science & Technology

    2014-09-26

    NAVAL SUBMARINE MEDICAL RESEARCH LABORATORY SUBMARINE BASE, GROTON, CONN. REPORT NUMBER 1048 CONTACT LENSES ON SUBMARINES... CONTACT LENSES ON SUBMARINES by James F. Socks, CDR, MSC, USN NAVAL SUBMARINE MEDICAL RESEARCH LABORATORY REPORT NUMBER 1048 NAVAL MEDICAL RESEARCH...DRSCHLAB Approved for public release; distribution unlimited SUMMARY PAGE PROBLEM To determine the feasibility of wearing contact lenses aboard

  6. Glasses and Contact Lenses

    MedlinePlus

    ... dientes Video: Getting an X-ray Glasses and Contact Lenses KidsHealth > For Kids > Glasses and Contact Lenses Print A A A What's in this ... together the way they should. But eyeglasses or contact lenses, also called corrective lenses, can help most ...

  7. ADS in a Nutshell

    NASA Astrophysics Data System (ADS)

    Demleitner, M.; Eichhorn, G.; Grant, C. S.; Accomazzi, A.; Murray, S. S.; Kurtz, M. J.

    1999-05-01

    The bibliographic databases maintained by the NASA Astrophysics Data System are updated approximately biweekly with records gathered from over 125 sources all over the world. Data are either sent to us electronically, retrieved by our staff via semi-automated procedures, or entered in our databases through supervised OCR procedures. PERL scripts are run on the data to convert them from their incoming format to our standard format so that they can be added to the master database at SAO. Once new data has been added, separate index files are created for authors, objects, title words, and text word, allowing these fields to be searched for individually or in combination with each other. During the indexing procedure, discipline-specific knowledge is taken into account through the use of rule-based procedures performing string normalization, context-sensitive word translation, and synonym and stop word replacement. Once the master text and index files have been updated at SAO, an automated procedure mirrors the changes in the database to the ADS mirror site via a secure network connection. The use of a public domain software tool called rsync allows incremental updating of the database files, with significant savings in the amount of data being transferred. In the past year, the ADS Abstract Service databases have grown by approximately 30%, including 50% growth in Physics, 25% growth in Astronomy and 10% growth in the Instrumentation datasets. The ADS Abstract Service now contains over 1.4 million abstracts (475K in Astronomy, 430K in Physics, 510K in Instrumentation, and 3K in Preprints), 175,000 journal abstracts, and 115,000 full text articles. In addition, we provide links to over 40,000 electronic HTML articles at other sites, 20,000 PDF articles, and 10,000 postscript articles, as well as many links to other external data sources.

  8. Contact micromechanics in granular media with clay

    SciTech Connect

    Ita, Stacey Leigh

    1994-08-01

    Many granular materials, including sedimentary rocks and soils, contain clay particles in the pores, grain contacts, or matrix. The amount and location of the clays and fluids can influence the mechanical and hydraulic properties of the granular material. This research investigated the mechanical effects of clay at grain-to-grain contacts in the presence of different fluids. Laboratory seismic wave propagation tests were conducted at ultrasonic frequencies using spherical glass beads coated with Montmorillonite clay (SWy-1) onto which different fluids were adsorbed. For all bead samples, seismic velocity increased and attenuation decreased as the contact stiffnesses increased with increasing stress demonstrating that grain contacts control seismic transmission in poorly consolidated and unconsolidated granular material. Coating the beads with clay added stiffness and introduced viscosity to the mechanical contact properties that increased the velocity and attenuation of the propagating seismic wave. Clay-fluid interactions were studied by allowing the clay coating to absorb water, ethyl alcohol, and hexadecane. Increasing water amounts initially increased seismic attenuation due to clay swelling at the contacts. Attenuation decreased for higher water amounts where the clay exceeded the plastic limit and was forced from the contact areas into the surrounding open pore space during sample consolidation. This work investigates how clay located at grain contacts affects the micromechanical, particularly seismic, behavior of granular materials. The need for this work is shown by a review of the effects of clays on seismic wave propagation, laboratory measurements of attenuation in granular media, and proposed mechanisms for attenuation in granular media.

  9. Contact lens in keratoconus

    PubMed Central

    Rathi, Varsha M; Mandathara, Preeji S; Dumpati, Srikanth

    2013-01-01

    Contact lenses are required for the visual improvement in patients with keratoconus. Various contact lens options, such as rigid gas permeable (RGP) lenses, soft and soft toric lenses, piggy back contact lenses (PBCL), hybrid lenses and scleral lenses are availble. This article discusses about selection of a lens depending on the type of keratoconus and the fitting philosophies of various contact lenses including the starting trial lens. A Medline search was carried out for articles in the English language with the keywords keratoconus and various contact lenses such as Rose k lens, RGP lens, hybrid lens, scleral lens and PBCL. PMID:23925325

  10. Boeing technicians join Node 1 for ISS to PMA-1 in the SSPF

    NASA Technical Reports Server (NTRS)

    1997-01-01

    Boeing technicians join Node 1 for the International Space Station (ISS) with the Pressurized Mating Adapter (PMA)-1 in KSC's Space Station Processing Facility. This PMA, identifiable by its bright red ring, is a cone-shaped connector for the space station's structural building block, known as Node 1. Seen here surrounded by scaffolding, Node 1 will have two PMAs attached, the second of which is scheduled for mating to the node in January 1998. The node and PMAs, which will be the first element of the ISS, are scheduled to be launched aboard the Space Shuttle Endeavour on STS-88 in July 1998.

  11. Structural Vulnerability of the Boeing B-29 Aircraft Wing to Damage by Warhead Fragments

    NASA Technical Reports Server (NTRS)

    Kordes, Eldon E.; OSullivan, William J., Jr.

    1952-01-01

    An elementary type of analysis has been used to determine the amount of wing tip that must be severed to produce irrevocable loss of control of a B-29 airplane. The remaining inboard structure of the Boeing B-29 wing has then been analyzed and curves are presented for the estimated reduction in structural strength due to four general types of damage produced by rod-type warhead fragments. The curves indicate the extent of structural damage required to produce a kill of the aircraft within 10 seconds.

  12. Boeing 747 aircraft with large external pod for transporting outsize cargo

    NASA Technical Reports Server (NTRS)

    Price, J. E.; Quartero, C. B.; Smith, P. M.; Washburn, G. F.

    1979-01-01

    The effect on structural arrangement, system weight, and range performance of the cargo pod payload carrying capability was determined to include either the bridge launcher or a spacelab module on a Boeing 747 aircraft. Modifications to the carrier aircraft and the installation time required to attach the external pod to the 747 were minimized. Results indicate that the increase in pod size was minimal, and that the basic 747 structure was adequate to safely absorb the load induced by ground or air operation while transporting either payload.

  13. STS-57 inflight maintenance (IFM) tool tray at Boeing FEPF bench review

    NASA Technical Reports Server (NTRS)

    1993-01-01

    STS-57 inflight maintenance (IFM) tool tray is displayed on a table top during the bench review at Boeing's Flight Equipment Processing Facility (FEPF) located near JSC. The tool tray will be located on Endeavour's, Orbiter Vehicle (OV) 105's, middeck in forward locker MF57K and includes pinch bar, deadblow hammer, punch, inspection mirror, speed handle assembly, robbins wrench, adjustable wrench, vise grips, connector pliers, ACCU bypass connector, connector strap wrench, locker tool, and mechanical fingers. Photo taken by NASA JSC contract photographer Benny Benavides.

  14. [Immunology of contact allergy].

    PubMed

    Martin, S F

    2011-10-01

    Contact allergy is a skin disease that is caused by the reaction of the immune system to low molecular weight chemicals. A hallmark of contact allergens is their chemical reactivity, which is not exhibited by toxic irritants. Covalent binding of contact allergens to or complex formation with proteins is essential for the activation of the immune system. As a consequence antigenic epitopes are formed, which are recognized by contact allergen-specific T cells. The generation of effector and memory T cells causes the high antigen specificity and the repeated antigen-specific skin reaction of contact allergy. New findings reveal that the less specific reaction of the innate immune system to contact allergens closely resembles the reaction to an infection. Therefore, contact allergy can be viewed as an immunologic misunderstanding since the skin contact with chemical allergens is interpreted as an infection. The growing understanding of the molecular and cellular pathologic mechanisms of contact allergy can aid the development of specific therapies and of in vitro alternatives to animal testing for the identification of contact allergens.

  15. Non-contact measurement of contact wire

    NASA Astrophysics Data System (ADS)

    Yi, Yaxing; Ye, Xuemei; Li, Zhongke; Yue, Kaiduan

    2008-12-01

    The overhead contact system is the power supply unit of the electric locomotive. This article is to introduce our newly developed method to measure the height and pull out value of the contact wire. A carema dolly which can move on railway is applied to bear the weight of the measure equipment; two linear CCD cameras are installed on the dolly symmetrically about the midline of two rails. While the dolly move along the railway, two CCD cameras grasp the image synchronously, and a computer real-time process the images, the height and pull out value can be calculate out from the images.

  16. [Periorbital contact eczema].

    PubMed

    Worm, M; Sterry, W

    2005-11-01

    Periorbital contact eczema is most commonly the result of an allergic contact dermatitis whereas other eczematous skin diseases like atopic eczema or seborrheic eczema occur less frequently. Also, other diseases like autoimmune disorders or rosacea need to be considered. Allergic contact dermatitis is a T-cell-mediated immunological response towards ubiquitous contact allergens. Activated T-cells migrate through the vessels into the skin and produce several inflammatory mediators. Epicutaneous patch testing is an important tool for the diagnosis of contact allergy whereby the allergens are analysed in terms of their ability to induce eczematous skin reaction. Until now the short-term use of corticosteroids are is employed for the treatment of allergic contact eczema. Modern substances with an optimal therapeutic index should rather be used.

  17. Contact angle hysteresis explained.

    PubMed

    Gao, Lichao; McCarthy, Thomas J

    2006-07-04

    A view of contact angle hysteresis from the perspectives of the three-phase contact line and of the kinetics of contact line motion is given. Arguments are made that advancing and receding are discrete events that have different activation energies. That hysteresis can be quantified as an activation energy by the changes in interfacial area is argued. That this is an appropriate way of viewing hysteresis is demonstrated with examples.

  18. Soft contact lenses

    PubMed Central

    Sutherland, R. L.; VanLeeuwen, Wm. N.

    1972-01-01

    A series of 55 patients were fitted with a new type of hydrophilic soft contact lens. These were found more comfortable than hard contact lenses and they had a protective and pain-relieving action in cases of chronic corneal disease. Vision was not as good as with hard contact lenses and a greater potential danger of infection was found. They are preferred by many patients despite the noticeable thick edge and the difficulty of obtaining an identical replacement. PMID:5042887

  19. Optical contact micrometer

    DOEpatents

    Jacobson, Steven D.

    2014-08-19

    Certain examples provide optical contact micrometers and methods of use. An example optical contact micrometer includes a pair of opposable lenses to receive an object and immobilize the object in a position. The example optical contact micrometer includes a pair of opposable mirrors positioned with respect to the pair of lenses to facilitate viewing of the object through the lenses. The example optical contact micrometer includes a microscope to facilitate viewing of the object through the lenses via the mirrors; and an interferometer to obtain one or more measurements of the object.

  20. Colors and contact dermatitis.

    PubMed

    Bonamonte, Domenico; Foti, Caterina; Romita, Paolo; Vestita, Michelangelo; Angelini, Gianni

    2014-01-01

    The diagnosis of skin diseases relies on several clinical signs, among which color is of paramount importance. In this review, we consider certain clinical presentations of both eczematous and noneczematous contact dermatitis in which color plays a peculiar role orientating toward the right diagnosis. The conditions that will be discussed include specific clinical-morphologic subtypes of eczematous contact dermatitis, primary melanocytic, and nonmelanocytic contact hyperchromia, black dermographism, contact chemical leukoderma, and others. Based on the physical, chemical, and biologic factors underlying a healthy skin color, the various skin shades drawing a disease picture are thoroughly debated, stressing their etiopathogenic origins and histopathologic aspects.

  1. Boeing's variable geometry chevron: morphing aerospace structures for jet noise reduction

    NASA Astrophysics Data System (ADS)

    Calkins, Frederick T.; Mabe, James H.; Butler, George W.

    2006-03-01

    Boeing is applying cutting edge smart material actuators to the next generation morphing technologies for aircraft. This effort has led to the Variable Geometry Chevrons (VGC), which utilize compact, light weight, and robust shape memory alloy (SMA) actuators. These actuators morph the shape of chevrons on the trailing edge of a jet engine in order to optimize acoustic and performance objectives at multiple flight conditions. We have demonstrated a technical readiness level of 7 by successfully flight testing the VGCs on a Boeing 777-300ER with GE-115B engines. In this paper we describe the VGC design, development and performance during flight test. Autonomous operation of the VGCs, which did not require a control system or aircraft power, was demonstrated. A parametric study was conducted showing the influence of VGC configurations on shockcell generated cabin noise reduction during cruise. The VGC system provided a robust test vehicle to explore chevron configurations for community and shockcell noise reduction. Most importantly, the VGC concept demonstrated an exciting capability to optimize jet nozzle performance at multiple flight conditions.

  2. Flight test evaluation of drag effects on surface coatings on the NASA Boeing 737 TCV airplane

    NASA Technical Reports Server (NTRS)

    George-Falvy, D.; Sikavi, D. A.

    1981-01-01

    A flight test program was conducted in which the effects of various surface coatings on aerodynamic drag were investigated; results of this program are described in this report. The tests were conducted at NASA-Langley Research Center on the terminal configured vehicle (TCV) Boeing 737 research airplane. The Boeing Company, as contractor with NASA under the Energy Efficient Transport (EET) program, planned and evaluated the experiment. The NASA-TCV Program Office coordinated the experiment and performed the flight tests. The principal objective of the test was to evaluate the drag reduction potential of an elastomeric polyurethane surface coating, CAAPCO B-274, which also has been considered for application on transport airplanes to protect leading edges from erosion. The smooth surface achievable with this type of coating held some promise of reducing the skin friction drag as compared to conventional production type aircraft surfaces, which are usually anodized bare metal or coated with corrosion protective paint. Requirements for high precision measurements were the principal considerations in the experiment.

  3. Boeing turns over P6 ITS to NASA and commander of STS-97

    NASA Technical Reports Server (NTRS)

    2000-01-01

    The International Space Station ground operations officially turn over the P6 Integrated Truss Structure to the NASA shuttle integration team in a ceremony in the Space Station Processing Facility. A symbolic key is presented to Brent Jett (at left), commander on mission STS-97, which is taking the P6 to the International Space Station. Next to him are (left to right) Bill Dowdell, mission manager; Mark Sorensen, outboard truss cargo element manager for Boeing; and John Elbon, Boeing ISS director of ground operations at KSC. Among the attendees at left watching the ceremony are other STS-97 crew members (in uniform, from left) Mission Specialists Joe Tanner and Carlos Noriega and Pilot Mike Bloomfield. Mission STS-97is the sixth construction flight to the International Space Station. Its payload includes a photovoltaic (PV) module, with giant solar arrays that will provide power to the Station. The mission involves two spacewalks to complete the solar array connections. STS-97 is scheduled to launch Nov. 30 at 10:05 p.m. EST.

  4. 76 FR 2846 - Airworthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and -300ER Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-18

    ... Company Model 777-200, - 200LR, -300, and -300ER Series Airplanes AGENCY: Federal Aviation Administration... Attention Service Bulletin 777-29-0032, dated August 9, 2007 (for Model 777-200, -200LR, -300, and -300ER..., -200LR, -300, and -300ER airplanes that require rubber FOD shields). Boeing Special Attention...

  5. 78 FR 68985 - Special Conditions: Boeing Model 777-200, -300, and -300ER Series Airplanes; Aircraft Electronic...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-18

    ... maintenance of the airplane. The existing regulations and guidance material did not anticipate these types of... Series Airplanes; Aircraft Electronic System Security Protection From Unauthorized Internal Access AGENCY... conditions are issued for the Boeing Model 777- 200, -300, and -300ER series airplanes. These airplanes,...

  6. The Boeing Company's Tech Prep Story: A Community College Bridge to the School-to-Work Strategy.

    ERIC Educational Resources Information Center

    Gayton, Carver; Parnell, Dale

    1996-01-01

    Reviews the Boeing Tech Prep Program, an associate degree program combining high school and community college vocational and academic curricula. Describes the three phases of the program's development: the provision of seed grants to schools, the development of an associate degree program, and the institution of an internship program. (MAB)

  7. Market Dominance, Efficiency, Innovation, and Globalization: A Case Study of the Tanker Competition Between Boeing and Northrop Grumman/EADS

    DTIC Science & Technology

    2008-04-23

    aircraft (Wingfield, 2008). The presidential helicopter was partially built by Italy’s Finmeccanica , while Britain’s BAE systems has been involved in... Finmeccanica – Britain’s BAE Systems has been involved in a number of projects since it purchased United Defense Industries in 2005. 11 Have Boeing and

  8. 75 FR 2433 - Special Conditions: Boeing Model 747-8/-8F Airplanes, Systems and Data Networks Security...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-15

    ... Administration 14 CFR Part 25 Special Conditions: Boeing Model 747-8/-8F Airplanes, Systems and Data Networks Security--Protection of Airplane Systems and Data Networks From Unauthorized External Access AGENCY... to or by external network sources. Discussion The Model 747-8/-8F architecture and...

  9. 78 FR 76731 - Special Conditions: Boeing Model 777-200, -300, and -300ER Series Airplanes; Rechargeable Lithium...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-19

    ...These special conditions are issued for the Boeing Model 777- 200, -300, and -300ER series airplanes. These airplanes as modified by the ARINC Aerospace Company will have a novel or unusual design feature, specifically the installation of rechargeable lithium ion batteries and battery system that will be used on an International Communications Group (ICG) ePhone cordless cabin handset. The......

  10. Assessment of risk to Boeing commerical transport aircraft from carbon fibers. [fiber release from graphite/epxoy materials

    NASA Technical Reports Server (NTRS)

    Clarke, C. A.; Brown, E. L.

    1980-01-01

    The possible effects of free carbon fibers on aircraft avionic equipment operation, removal costs, and safety were investigated. Possible carbon fiber flow paths, flow rates, and transfer functions into the Boeing 707, 727, 737, 747 aircraft and potentially vulnerable equipment were identified. Probabilities of equipment removal and probabilities of aircraft exposure to carbon fiber were derived.

  11. 76 FR 13541 - Airworthiness Directives; The Boeing Company Model 757-200, -200CB, and -300 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-14

    ... target and the sensor proximity switch, and testing to ensure positive door locking and corrective action... relocating and adjusting the sensor target and the sensor proximity switch to forward locations on the... a new target and the switch is remounted on the new bracket. Boeing Service Bulletin...

  12. 76 FR 5061 - Special Conditions: TTF Aerospace, LLC, Modification to Boeing Model 767-300 Series Airplanes...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-28

    ... module (CRM). The applicable airworthiness regulations do not contain adequate or appropriate safety... installation of a lower lobe pilot crew rest module (CRM) in Boeing Model 767-300 series airplanes. The CRM..., will be provided for each occupant permitted in the CRM. The CRM is intended to be occupied only...

  13. Contact Noise in Sodium Beta Alumina.

    DTIC Science & Technology

    1987-05-01

    AD-Al~i 128 CONTACT NOISE IN SODIUM BETA ALUMINA(U) UTANHUNIV SALT i/i LAKE CITY DEPT OF PHYSICS C K KUD ET AL MAY 87 UN SLR55IF IED FG 1,b2 NL UN...by Chu Kun Kuo* and James J. Brophy Physics Department University of Utah Salt Lake City, Utah 84112 ABSTRACT/ Contact noise in sodium 0alumina cells...ZIPCo*I) UNIVERSITY OF UTAH UNIVERISTY OF NEW MEXICO SALT LAKE CITY UT 84112 Bandelier Hall West Alhkq..u u. m (1 71-11 so NAME of FUNDING /SPONSORING Sb

  14. Factor XII Contact Activation.

    PubMed

    Naudin, Clément; Burillo, Elena; Blankenberg, Stefan; Butler, Lynn; Renné, Thomas

    2017-03-27

    Contact activation is the surface-induced conversion of factor XII (FXII) zymogen to the serine protease FXIIa. Blood-circulating FXII binds to negatively charged surfaces and this contact to surfaces triggers a conformational change in the zymogen inducing autoactivation. Several surfaces that have the capacity for initiating FXII contact activation have been identified, including misfolded protein aggregates, collagen, nucleic acids, and platelet and microbial polyphosphate. Activated FXII initiates the proinflammatory kallikrein-kinin system and the intrinsic coagulation pathway, leading to formation of bradykinin and thrombin, respectively. FXII contact activation is well characterized in vitro and provides the mechanistic basis for the diagnostic clotting assay, activated partial thromboplastin time. However, only in the past decade has the critical role of FXII contact activation in pathological thrombosis been appreciated. While defective FXII contact activation provides thromboprotection, excess activation underlies the swelling disorder hereditary angioedema type III. This review provides an overview of the molecular basis of FXII contact activation and FXII contact activation-associated disease states.

  15. Noneczematous Contact Dermatitis

    PubMed Central

    Foti, Caterina; Vestita, Michelangelo; Angelini, Gianni

    2013-01-01

    Irritant or allergic contact dermatitis usually presents as an eczematous process, clinically characterized by erythematoedematovesicous lesions with intense itching in the acute phase. Such manifestations become erythematous-scaly as the condition progresses to the subacute phase and papular-hyperkeratotic in the chronic phase. Not infrequently, however, contact dermatitis presents with noneczematous features. The reasons underlying this clinical polymorphism lie in the different noxae and contact modalities, as well as in the individual susceptibility and the various targeted cutaneous structures. The most represented forms of non-eczematous contact dermatitis include the erythema multiforme-like, the purpuric, the lichenoid, and the pigmented kinds. These clinical entities must obviously be discerned from the corresponding “pure” dermatitis, which are not associated with contact with exogenous agents. PMID:24109520

  16. Historical Literature in the ADS

    NASA Astrophysics Data System (ADS)

    Eichhorn, G.; Kurtz, M. J.; Accomazzi, A.; Grant, C. S.

    1997-12-01

    The Astrophysics Data System at http://adswww.harvard.edu is in the process of scanning the historical astronomical literature and making it available through the World Wide Web. We have scanned several volumes from the early 1800's of the "Astronomische Nachrichten", and the "Monthly Notices of the Royal Astronomical Society", the two oldest astronomical journals. We also have several of the early volumes of the "Astrophysical Journal" and the "Astronomical Journal" available. For all the journals that we cover, we have scanned volume 1. These early volumes can be accessed on a page-by-page basis. We plan to continue to scan this historical literature and complete these journals within the next year. We are also collaborating with a preservation project at Harvard University. This project will microfilm selected parts of astronomical Observatory reports. We plan to scan these microfilms to produce electronic images of these reports and put them on-line in the ADS. We hope to eventually cover most of the astronomical literature. In order to organize the scanned pages into articles, we need tables of contents (ToC). The early issues of the journals did not have printed ToC pages, so this needs to be done by hand. We do not have the financial resources to build these ToCs. We are looking for collaborators who would be willing to work with us in building these ToCs for the older journals and observatory reports. If you are interested in such a project, please contact the first author at gei@cfa.harvard.edu.

  17. Supersymmetry of AdS and flat IIB backgrounds

    NASA Astrophysics Data System (ADS)

    Beck, S.; Gutowski, J.; Papadopoulos, G.

    2015-02-01

    We present a systematic description of all warped AdS n × w M 10- n and IIB backgrounds and identify the a priori number of supersymmetries N preserved by these solutions. In particular, we find that the AdS n backgrounds preserve for n ≤ 4 and for 4 < n ≤ 6 supersymmetries and for suitably restricted. In addition under some assumptions required for the applicability of the maximum principle, we demonstrate that the Killing spinors of AdS n backgrounds can be identified with the zero modes of Dirac-like operators on M 10- n establishing a new class of Lichnerowicz type theorems. Furthermore, we adapt some of these results to backgrounds with fluxes by taking the AdS radius to infinity. We find that these backgrounds preserve for 2 < n ≤ 4 and for 4 < n ≤ 7 supersymmetries. We also demonstrate that the Killing spinors of AdS n × w M 10- n do not factorize into Killing spinors on AdS n and Killing spinors on M 10- n .

  18. [Value-Added--Adding Economic Value in the Food Industry].

    ERIC Educational Resources Information Center

    Welch, Mary A., Ed.

    1989-01-01

    This booklet focuses on the economic concept of "value added" to goods and services. A student activity worksheet illustrates how the steps involved in processing food are examples of the concept of value added. The booklet further links food processing to the idea of value added to the Gross National Product (GNP). Discussion questions,…

  19. Allergic contact dermatitis.

    PubMed

    Becker, Detlef

    2013-07-01

    Allergic contact dermatitis is a frequent inflammatory skin disease. The suspected diagnosis is based on clinical symptoms, a plausible contact to allergens and a suitable history of dermatitis. Differential diagnoses should be considered only after careful exclusion of any causal contact sensitization. Hence, careful diagnosis by patch testing is of great importance. Modifications of the standardized test procedure are the strip patch test and the repeated open application test. The interpretation of the SLS (sodium lauryl sulfate) patch test as well as testing with the patients' own products and working materials are potential sources of error. Accurate patch test reading is affected in particular by the experience and individual factors of the examiner. Therefore, a high degree of standardization and continuous quality control is necessary and may be supported by use of an online patch test reading course made available by the German Contact Dermatitis Research Group. A critical relevance assessment of allergic patch test reactions helps to avoid relapses and the consideration of differential diagnoses. Any allergic test reaction should be documented in an allergy ID card including the INCI name, if appropriate. The diagnostics of allergic contact dermatitis is endangered by a seriously reduced financing of patch testing by the German statutory health insurances. Restrictive regulations by the German Drug Law block the approval of new contact allergens for routine patch testing. Beside the consistent avoidance of allergen contact, temporary use of systemic and topical corticosteroids is the therapy of first choice.

  20. Telescopic vision contact lens

    NASA Astrophysics Data System (ADS)

    Tremblay, Eric J.; Beer, R. Dirk; Arianpour, Ashkan; Ford, Joseph E.

    2011-03-01

    We present the concept, optical design, and first proof of principle experimental results for a telescopic contact lens intended to become a visual aid for age-related macular degeneration (AMD), providing magnification to the user without surgery or external head-mounted optics. Our contact lens optical system can provide a combination of telescopic and non-magnified vision through two independent optical paths through the contact lens. The magnified optical path incorporates a telescopic arrangement of positive and negative annular concentric reflectors to achieve 2.8x - 3x magnification on the eye, while light passing through a central clear aperture provides unmagnified vision.

  1. Optical contacting of quartz

    NASA Technical Reports Server (NTRS)

    Payne, L. L.

    1982-01-01

    The strength of the bond between optically contacted quartz surfaces was investigated. The Gravity Probe-B (GP-B) experiment to test the theories of general relativity requires extremely precise measurements. The quartz components of the instruments to make these measurements must be held together in a very stable unit. Optical contacting is suggested as a possible method of joining these components. The fundamental forces involved in optical contacting are reviewed and relates calculations of these forces to the results obtained in experiments.

  2. AdS3 Solutions of IIB Supergravity

    SciTech Connect

    Kim, Nakwoo

    2005-12-02

    We consider pure D3-brane configurations of IIB string theory which lead to supergravity solutions containing an AdS3 factor. They can provide new examples of AdS3/CFT2 examples on D3-branes whose worldvolume is partially compactified. When the internal 7 dimensional space is non-compact, they are related to fluctuations of higher dimensional AdS/CFT duality examples, thus dual to the BPS operators of D = 4 superconformal field theories. We find that supersymmetry requires the 7 dimensional space is warped Hopf-fibration of (real) 6 dimensional Kahler manifolds.

  3. Action growth for AdS black holes

    NASA Astrophysics Data System (ADS)

    Cai, Rong-Gen; Ruan, Shan-Ming; Wang, Shao-Jiang; Yang, Run-Qiu; Peng, Rong-Hui

    2016-09-01

    Recently a Complexity-Action (CA) duality conjecture has been proposed, which relates the quantum complexity of a holographic boundary state to the action of a Wheeler-DeWitt (WDW) patch in the anti-de Sitter (AdS) bulk. In this paper we further investigate the duality conjecture for stationary AdS black holes and derive some exact results for the growth rate of action within the Wheeler-DeWitt (WDW) patch at late time approximation, which is supposed to be dual to the growth rate of quantum complexity of holographic state. Based on the results from the general D-dimensional Reissner-Nordström (RN)-AdS black hole, rotating/charged Bañados-Teitelboim-Zanelli (BTZ) black hole, Kerr-AdS black hole and charged Gauss-Bonnet-AdS black hole, we present a universal formula for the action growth expressed in terms of some thermodynamical quantities associated with the outer and inner horizons of the AdS black holes. And we leave the conjecture unchanged that the stationary AdS black hole in Einstein gravity is the fastest computer in nature.

  4. Value Added in English Schools

    ERIC Educational Resources Information Center

    Ray, Andrew; McCormack, Tanya; Evans, Helen

    2009-01-01

    Value-added indicators are now a central part of school accountability in England, and value-added information is routinely used in school improvement at both the national and the local levels. This article describes the value-added models that are being used in the academic year 2007-8 by schools, parents, school inspectors, and other…

  5. Constructing the AdS dual of a Fermi liquid: AdS black holes with Dirac hair

    NASA Astrophysics Data System (ADS)

    Čubrović, Mihailo; Zaanen, Jan; Schalm, Koenraad

    2011-10-01

    We provide evidence that the holographic dual to a strongly coupled charged Fermi liquid has a non-zero fermion density in the bulk. We show that the pole-strength of the stable quasiparticle characterizing the Fermi surface is encoded in the AdS probability density of a single normalizable fermion wavefunction in AdS. Recalling Migdal's theorem which relates the pole strength to the Fermi-Dirac characteristic discontinuity in the number density at ω F , we conclude that the AdS dual of a Fermi liquid is described by occupied on-shell fermionic modes in AdS. Encoding the occupied levels in the total spatially averaged probability density of the fermion field directly, we show that an AdS Reissner-Nordström black holein a theory with charged fermions has a critical temperature, at which the system undergoes a first-order transition to a black hole with a non-vanishing profile for the bulk fermion field. Thermodynamics and spectral analysis support that the solution with non-zero AdS fermion-profile is the preferred ground state at low temperatures.

  6. 76 FR 38074 - Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, 747-200B, 747-200C, 747...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-29

    ... stretched- upper-deck configuration, as identified in Boeing Alert Service Bulletin 747-53A2303, dated June... is measured from the time of the stretched- upper-deck modification. (i) If no cracking is...

  7. Occupational Contact Dermatitis

    PubMed Central

    2008-01-01

    Occupational contact dermatitis accounts for 90% of all cases of work-related cutaneous disorders. It can be divided into irritant contact dermatitis, which occurs in 80% of cases, and allergic contact dermatitis. In most cases, both types will present as eczematous lesions on exposed parts of the body, notably the hands. Accurate diagnosis relies on meticulous history taking, thorough physical examination, careful reading of Material Safety Data Sheets to distinguish between irritants and allergens, and comprehensive patch testing to confirm or rule out allergic sensitization. This article reviews the pathogenesis and clinical manifestations of occupational contact dermatitis and provides diagnostic guidelines and a rational approach to management of these often frustrating cases. PMID:20525126

  8. SAM Technical Contacts

    EPA Pesticide Factsheets

    These technical contacts are available to help with questions regarding method deviations, modifications, sample problems or interferences, quality control requirements, the use of alternative methods, or the need to address analytes or sample types.

  9. Fragrance allergic contact dermatitis.

    PubMed

    Cheng, Judy; Zug, Kathryn A

    2014-01-01

    Fragrances are a common cause of allergic contact dermatitis in Europe and in North America. They can affect individuals at any age and elicit a spectrum of reactions from contact urticaria to systemic contact dermatitis. Growing recognition of the widespread use of fragrances in modern society has fueled attempts to prevent sensitization through improved allergen identification, labeling, and consumer education. This review provides an overview and update on fragrance allergy. Part 1 discusses the epidemiology and evaluation of suspected fragrance allergy. Part 2 reviews screening methods, emerging fragrance allergens, and management of patients with fragrance contact allergy. This review concludes by examining recent legislation on fragrances and suggesting potential additions to screening series to help prevent and detect fragrance allergy.

  10. Contact air abrasion.

    PubMed

    Porth, R

    1999-05-01

    The advantages of contact air abrasion techniques are readily apparent. The first, of course, is the greatly increased ease of use. Working with contact also tends to speed the learning curve by giving the process a more natural dental feel. In addition, as one becomes familiar with working with a dust stream, the potential for misdirecting the air flow is decreased. The future use of air abrasion for deep decay removal will make this the treatment of choice for the next millennium.

  11. Contact dermatitis complicating pinnaplasty.

    PubMed

    Singh-Ranger, G; Britto, J A; Sommerlad, B C

    2001-04-01

    Proflavine allergy is uncommon, occurring in approximately 6% of patients attending contact dermatitis clinics. Proflavine wool is used by many surgeons in the UK as a dressing that can be moulded to conform to the contours of a corrected prominent ear. It may have bacteriostatic properties. We present a case where contact dermatitis in response to proflavine developed after pinnaplasty. This caused diagnostic confusion, a lengthened hospital stay and an unsightly hypertrophic scar.

  12. The impact of contact

    NASA Astrophysics Data System (ADS)

    Finney, B.

    1986-10-01

    Scenarios of the impact on human society of radio contact with an extraterrestrial civilization are presented. Some believe that contact with advanced extraterrestrials would quickly devastate the human spirit, while others believe that these super-intelligent beings would show the inhabitants of the earth how to live in peace. It is proposed that the possible existence of extraterrestrial civilizations and the development of means of studying and communicating with them need to be considered.

  13. ELECTRIC CONTACT MEANS

    DOEpatents

    Grear, J.W. Jr.

    1959-03-10

    A switch adapted to maintain electrical connections under conditions of vibration or acceleration is described. According to the invention, thc switch includes a rotatable arm carrying a conductive bar arranged to close against two contacts spaced in the same plane. The firm and continuous engagement of the conductive bar with the contacts is acheived by utilizeing a spring located betwenn the vbar and athe a rem frzme and slidable mounting the bar in channel between two arms suspendef from the arm frame.

  14. Lettuce contact allergy.

    PubMed

    Paulsen, Evy; Andersen, Klaus E

    2016-02-01

    Lettuce (Lactuca sativa L.) and its varieties are important vegetable crops worldwide. They are also well-known, rarely reported, causes of contact allergy. As lettuce allergens and extracts are not commercially available, the allergy may be underdiagnosed. The aims of this article are to present new data on lettuce contact allergy and review the literature. Lettuce is weakly allergenic, and occupational cases are mainly reported. Using aimed patch testing in Compositae-allergic patients, two recent Danish studies showed prevalence rates of positive lettuce reactions of 11% and 22%. The majority of cases are non-occupational, and may partly be caused by cross-reactivity. The sesquiterpene lactone mix seems to be a poor screening agent for lettuce contact allergy, as the prevalence of positive reactions is significantly higher in non-occupationally sensitized patients. Because of the easy degradability of lettuce allergens, it is recommended to patch test with freshly cut lettuce stem and supplement this with Compositae mix. As contact urticaria and protein contact dermatitis may present as dermatitis, it is important to perform prick-to-prick tests, and possibly scratch patch tests as well. Any person who is occupationally exposed to lettuce for longer periods, especially atopics, amateur gardeners, and persons keeping lettuce-eating pets, is potentially at risk of developing lettuce contact allergy.

  15. AdS-Carroll branes

    NASA Astrophysics Data System (ADS)

    Clark, T. E.; ter Veldhuis, T.

    2016-11-01

    Coset methods are used to determine the action of a co-dimension one brane (domain wall) embedded in (d + 1)-dimensional AdS space in the Carroll limit in which the speed of light goes to zero. The action is invariant under the non-linearly realized symmetries of the AdS-Carroll spacetime. The Nambu-Goldstone field exhibits a static spatial distribution for the brane with a time varying momentum density related to the brane's spatial shape as well as the AdS-C geometry. The AdS-C vector field dual theory is obtained.

  16. ADS Based on Linear Accelerators

    NASA Astrophysics Data System (ADS)

    Pan, Weimin; Dai, Jianping

    An accelerator-driven system (ADS), which combines a particle accelerator with a subcritical core, is commonly regarded as a promising device for the transmutation of nuclear waste, as well as a potential scheme for thorium-based energy production. So far the predominant choice of the accelerator for ADS is a superconducting linear accelerator (linac). This article gives a brief overview of ADS based on linacs, including the motivation, principle, challenges and research activities around the world. The status and future plan of the Chinease ADS (C-ADS) project will be highlighted and discussed in depth as an example.

  17. Measured Radiation Patterns of the Boeing 91-Element ICAPA Antenna With Comparison to Calculations

    NASA Technical Reports Server (NTRS)

    Lambert, Kevin M.; Burke, Thomas (Technical Monitor)

    2003-01-01

    This report presents measured antenna patterns of the Boeing 91-Element Integrated Circuit Active Phased Array (ICAPA) Antenna at 19.85 GHz. These patterns were taken in support of various communication experiments that were performed using the antenna as a testbed. The goal here is to establish a foundation of the performance of the antenna for the experiments. An independent variable used in the communication experiments was the scan angle of the antenna. Therefore, the results presented here are patterns as a function of scan angle, at the stated frequency. Only a limited number of scan angles could be measured. Therefore, a computer program was written to simulate the pattern performance of the antenna at any scan angle. This program can be used to facilitate further study of the antenna. The computed patterns from this program are compared to the measured patterns as a means of validating the model.

  18. Boeing Crew Exploration Vehicle Environmental Control and Life Support System Architecture Overview

    NASA Technical Reports Server (NTRS)

    Saiidi, Mo; Lewis, John F.

    2007-01-01

    The Boeing Company under the teaming agreement with the Northrop Grumman Systems Corporation and in compliance with the NASA Phase 1 contract, had the responsibilities for the CEV architecture development of the Environmental control and life support (ECLS) system under the NASA Phase 1 contract. The ECLS system was comprised of the various subsystems which provided for a shirt-sleeve habitable environment for crew to live and work in the crew module of the CEV. This architecture met the NASA requirements to ferry cargo and crew to ISS, and Lunar sortie missions, with extensibility to long duration missions to Moon and MARS. This paper provides a summary overview of the CEV ECLS subsystems which was proposed in compliance with the contract activities.

  19. STS-65 crewmembers and backup participate in bench review at Boeing Building

    NASA Technical Reports Server (NTRS)

    1994-01-01

    STS-65 crewmembers, wearing clean suits, look over equipment to be carried aboard the Space Shuttle Columbia, Orbiter Vehicle (OV) 102, for the scheduled July flight of the second International Microgravity Laboratory (IML-2) mission. Surrounding a table full of equipment at Boeing's Flight Equipment Processing Facility near the Johnson Space Center (JSC), are (left to right) Mission Specialist (MS) Leroy Chiao, MS Donald A. Thomas, Commander Robert D. Cabana, Payload Specialist Chiaki Mukai, Payload Commander (PLC) Richard J. Hieb, and backup (alternate) payload specialist Jean-Jacques Favier. Mukai represents Japan's National Space Development Agency (NASDA) and Favier represents France's Centre National d'Etudes Spatiales. Photo taken by NASA JSC contract photographer Scott A. Wickes.

  20. STS-65 crewmembers and backup participate in bench review at Boeing Building

    NASA Technical Reports Server (NTRS)

    1994-01-01

    Attired in clean suits, STS-65 Payload Commander (PLC) Richard J. Hieb (left), backup (alternate) payload specialist Jean-Jacques Favier (center), and Payload Specialist Chiaki Mukai look over equipment to be carried aboard the Space Shuttle Columbia, Orbiter Vehicle (OV) 102, for the scheduled July flight of the second International Microgravity Laboratory (IML-2) mission. Hygiene supplies including plaid lintless towels are stacked on the table in front of the crewmembers. The bench review and equipment inspection took place at the Boeing Flight Equipment Processing Facility (FEPF) near the Johnson Space Center (JSC). Mukai represents Japan's National Space Development Agency (NASDA) and Favier represents France's Centre National d'Etudes Spatiales (CNES). Photo taken by NASA JSC contract photographer Scott A. Wickes.

  1. Crash Simulation of a Boeing 737 Fuselage Section Vertical Drop Test

    NASA Technical Reports Server (NTRS)

    Fasanella, Edwin L.; Jackson, Karen E.; Jones, Yvonne T.; Frings, Gary; Vu, Tong

    2004-01-01

    A 30-ft/s vertical drop test of a fuselage section of a Boeing 737 aircraft was conducted in October of 1999 at the FAA Technical Center in Atlantic City, NJ. This test was performed to evaluate the structural integrity of a conformable auxiliary fuel tank mounted beneath the floor and to determine its effect on the impact response of the airframe structure and the occupants. The test data were used to compare with a finite element simulation of the fuselage structure and to gain a better understanding of the impact physics through analytical/experimental correlation. To perform this simulation, a full-scale 3-dimensional finite element model of the fuselage section was developed using the explicit, nonlinear transient-dynamic finite element code, MSC.Dytran. The emphasis of the simulation was to predict the structural deformation and floor-level acceleration responses obtained from the drop test of the B737 fuselage section with the auxiliary fuel tank.

  2. After 24-hour scrub, the Boeing Delta II rocket carrying Stardust launches on time

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Into a pristine blue sky, the Boeing Delta II rocket carrying the Stardust spacecraft leaves clouds of exhaust behind as it lifts off at 4:04:15 p.m. EST from Launch Pad 17-A, Cape Canaveral Air Station. Stardust is destined for a close encounter with the comet Wild 2 in January 2004. Using a silicon-based substance called aerogel, Stardust will capture comet particles flying off the nucleus of the comet. The spacecraft also will bring back samples of interstellar dust. These materials consist of ancient pre-solar interstellar grains and other remnants left over from the formation of the solar system. Scientists expect their analysis to provide important insights into the evolution of the sun and planets and possibly into the origin of life itself. The collected samples will return to Earth in a sample return capsule to be jettisoned as Stardust swings by Earth in January 2006.

  3. Failure forecast of Boeing 737 bleed air system using artificial neural networks

    NASA Astrophysics Data System (ADS)

    Al-Wadiee, Waheed

    In this study, the failure rate of different types of bleed air control valves for the Boeing 737 aircraft is modeled. Two approaches are utilized to perform this work. In the first approach, Weibull model, in which different parameters are utilized and tested, is used. In the second one, a common type of the Artificial Neural Network (ANN) modeling is used. A Feed-forward back-propagation algorithm is implemented to train the network. Subsequently, the optimum number of neurons and layers that give the best result compared to the actual data are determined. Finally, the outputs from both models are compared against the actual data. The final results show a high level of accuracy of the ANN's predictions compared to the more traditional Weibull modeling. The developed verified model lends itself to applications that extend from scheduling replacements operations of these valves, to developing plans for inventory management in any aviation engines maintenance facility.

  4. Flight test of ARINC 741 configuration low gain SATCOM system on Boeing 747-400 aircraft

    NASA Technical Reports Server (NTRS)

    Murphy, Timothy A.; Stapleton, Brian P.

    1990-01-01

    The Boeing company conducted a flight test of a SATCOM system similar to the ARINC 741 configuration on a production model 747-400. A flight plan was specifically designed to test the system over a wide variety of satellite elevations and aircraft attitudes as well as over land and sea. Interface bit errors, signal quality and aircraft position and navigational inputs were all recorded as a function of time. Special aircraft maneuvers were performed to demonstrate the potential for shadowing by aircraft structures. Both a compass rose test and the flight test indicated that shadowing from the tail is insignificant for the 747-400. However, satellite elevation angles below the aircraft horizon during banking maneuvers were shown to have a significant deleterious effect on SATCOM communications.

  5. After 24-hour scrub, another tower rollback for the Boeing Delta II rocket carrying Stardust

    NASA Technical Reports Server (NTRS)

    1999-01-01

    As tower rollback begins, the Boeing Delta II rocket carrying the Stardust spacecraft waits on Launch Pad 17-A, Cape Canaveral Air Station, for the second launch attempt at 4:04 p.m. EST. The original launch was scrubbed on Feb. 6 for 24 hours. Stardust is destined for a close encounter with the comet Wild 2 in January 2004. Using a silicon-based substance called aerogel, Stardust will capture comet particles flying off the nucleus of the comet. The spacecraft also will bring back samples of interstellar dust. These materials consist of ancient pre-solar interstellar grains and other remnants left over from the formation of the solar system. Scientists expect their analysis to provide important insights into the evolution of the sun and planets and possibly into the origin of life itself. The collected samples will return to Earth in a sample return capsule to be jettisoned as Stardust swings by Earth in January 2006.

  6. AdS spacetimes from wrapped D3-branes

    NASA Astrophysics Data System (ADS)

    Gauntlett, Jerome P.; MacConamhna, Oisín A. P.

    2007-12-01

    We derive a geometrical characterization of a large class of AdS3 and AdS2 supersymmetric spacetimes in type IIB supergravity with non-vanishing five-form flux using G-structures. These are obtained as special cases of a class of supersymmetric spacetimes with an {{\\bb R}}^{1,1} or {{\\bb R}} (time) factor that are associated with D3 branes wrapping calibrated two or three cycles, respectively, in manifolds with SU(2), SU(3), SU(4) and G2 holonomy. We show how two explicit AdS solutions, previously constructed in gauged supergravity, satisfy our more general G-structure conditions. For each explicit solution, we also derive a special holonomy metric which, although singular, has an appropriate calibrated cycle. After analytic continuation, some of the classes of AdS spacetimes give rise to known classes of BPS bubble solutions with {{\\bb R}}\\times {\\it SO}(4)\\times {\\it SO}(4), {{\\bb R}}\\times {\\it SO}(4)\\times U(1) and {{\\bb R}}\\times {\\it SO}(4) symmetry. These have 1/2, 1/4 and 1/8 supersymmetry, respectively. We present a new class of 1/8 BPS geometries with {{\\bb R}}\\times {\\it SU}(2) symmetry, obtained by analytic continuation of the class of AdS spacetimes associated with D3-brane wrapped on associative three cycles.

  7. Revisiting the thermodynamic relations in AdS /CMT models

    NASA Astrophysics Data System (ADS)

    Hyun, Seungjoon; Park, Sang-A.; Yi, Sang-Heon

    2017-03-01

    Motivated by the recent unified approach to the Smarr-like relation of anti-de Sitter (AdS) planar black holes in conjunction with the quasilocal formalism on conserved charges, we revisit the quantum statistical and thermodynamic relations of hairy AdS planar black holes. By extending the previous results, we identify the hairy contribution in the bulk and show that the holographic computation can be improved so that it is consistent with the bulk computation. We argue that the first law can be retained in its universal form and that the relation between the on-shell renormalized Euclidean action and its free energy interpretation in gravity may also be undeformed even with the hairy contribution in hairy AdS black holes.

  8. Entanglement entropy for free scalar fields in AdS

    NASA Astrophysics Data System (ADS)

    Sugishita, Sotaro

    2016-09-01

    We compute entanglement entropy for free massive scalar fields in anti-de Sitter (AdS) space. The entangling surface is a minimal surface whose boundary is a sphere at the boundary of AdS. The entropy can be evaluated from the thermal free energy of the fields on a topological black hole by using the replica method. In odd-dimensional AdS, exact expressions of the Rényi entropy S n are obtained for arbitrary n. We also evaluate 1-loop corrections coming from the scalar fields to holographic entanglement entropy. Applying the results, we compute the leading difference of entanglement entropy between two holographic CFTs related by a renormalization group flow triggered by a double trace deformation. The difference is proportional to the shift of a central charge under the flow.

  9. Solutions of free higher spins in AdS

    NASA Astrophysics Data System (ADS)

    Lü, H.; Shao, Kai-Nan

    2011-11-01

    We consider free massive and massless higher integer spins in AdS backgrounds in general D dimensions. We obtain the solutions corresponding to the highest-weight state of the spin-ℓ representations of the SO (2 , D - 1) isometry groups. The solution for the spin-ℓ field is expressed recursively in terms of that for the spin- (ℓ - 1). Thus starting from the explicit spin-0, all the higher-spin solutions can be obtained. These solutions allow us to derive the generalized Breitenlohner-Freedman bound, and analyze the asymptotic falloffs. In particular, solutions with negative mass square in general have falloffs slower than those of the Schwarzschild AdS black holes in the AdS boundaries.

  10. The contact caveat: negative contact predicts increased prejudice more than positive contact predicts reduced prejudice.

    PubMed

    Barlow, Fiona Kate; Paolini, Stefania; Pedersen, Anne; Hornsey, Matthew J; Radke, Helena R M; Harwood, Jake; Rubin, Mark; Sibley, Chris G

    2012-12-01

    Contact researchers have largely overlooked the potential for negative intergroup contact to increase prejudice. In Study 1, we tested the interaction between contact quantity and valence on prejudice toward Black Australians (n = 1,476), Muslim Australians (n = 173), and asylum seekers (n = 293). In all cases, the association between contact quantity and prejudice was moderated by its valence, with negative contact emerging as a stronger and more consistent predictor than positive contact. In Study 2, White Americans (n = 441) indicated how much positive and negative contact they had with Black Americans on separate measures. Although both quantity of positive and negative contact predicted racism and avoidance, negative contact was the stronger predictor. Furthermore, negative (but not positive) contact independently predicted suspicion about Barack Obama's birthplace. These results extend the contact hypothesis by issuing an important caveat: Negative contact may be more strongly associated with increased racism and discrimination than positive contact is with its reduction.

  11. Improvements in contact resistivity and thermal stability of Au-contacted InP solar cells

    NASA Technical Reports Server (NTRS)

    Fatemi, Navid S.; Weizer, Victor G.

    1991-01-01

    Specific contact resistivities for as-fabricated Au contacts on n-p InP solar cells are typically in the 10(exp -3) ohm/sq cm range, but contact resistivities in the 10(exp -6) ohm/sq cm range can be obtained if the cells are heat treated at 400 C for a few minutes. This heat treatment, however, results in a dramatic drop in the open circuit voltage of the cell due to excessive dissolution of the emitter into the metallization. It was found that low values of contact resistivity can be secured without the accompanying drop in the open circuit voltage by adding Ga and In in the Au metallization. It is shown that Au contacts containing as little as 1 percent atomic Ga can suppress the reaction that takes place at the metal-InP interface during heat treatment, while exhibiting contact resistivity values in the low 10(exp -5) ohm/sq cm. Detailed explanations for the observed superior thermal stability of these contacts are presented.

  12. Focusing on Contact Lens Safety

    MedlinePlus

    ... Consumers Home For Consumers Consumer Updates Focusing on Contact Lens Safety Share Tweet Linkedin Pin it More ... substantial consumer injury. Back to top Types of Contact Lenses General categories Soft contact lenses. These are ...

  13. Diffusion and chaos from near AdS2 horizons

    NASA Astrophysics Data System (ADS)

    Blake, Mike; Donos, Aristomenis

    2017-02-01

    We calculate the thermal diffusivity D = κ/c ρ and butterfly velocity v B in holographic models that flow to AdS2 × R d fixed points in the infra-red. We show that both these quantities are governed by the same irrelevant deformation of AdS2 and hence establish a simple relationship between them. When this deformation corresponds to a universal dilaton mode of dimension Δ = 2 then this relationship is always given by D = v B 2 /(2 πT).

  14. 76 FR 41659 - Airworthiness Directives; The Boeing Company Model 747 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-15

    ... nor increase the scope of the AD. Costs of Compliance We estimate that this AD affects 215 airplanes of U.S. registry. The new requirements of this AD add no additional economic burden. The current costs for this AD are repeated below for the convenience of affected operators. The actions that...

  15. Allergic contact dermatitis.

    PubMed

    Alikhan, Ali; Maibach, Howard I

    2014-01-01

    Allergic contact dermatitis is one of the most important dermatologic disorders worldwide - it can cause significant morbidity and decreased quality of life, as well as having major economic implications and loss of vocational productivity. Patch testing is the most important discovery in allergic contact dermatitis and the best diagnostic modality to date; the thin-layer rapid- use epicutaneous (TRUE) test is a more recent patch test development which has improved the convenience and feasibility of the test. The future of allergic contact dermatitis is bright as we continue to learn more about the science of the disorder, as well as ways to improve diagnosis and patient care. Furthermore, it is important to remember, in this global age, that cooperation between health care providers worldwide is essential.

  16. [Contact glass tonometer].

    PubMed

    Kanngiesser, H; Robert, Y; Dekker, P

    1996-10-01

    This paper present a tonometer incorporated in a contact lens, which allows simultaneous measurement of intraocular pressure and performance ophthalmoscopy. The tonometer can record the pulse curve continuously, which can give us an indication of any circulatory problem. The device is therefore expected to yield additional information useful for the diagnosis of early glaucoma. Te device has three force sensors built in, which allow continuous measurement of the force exerted on the eye surface by the contact lens. The force of the contact lens on the eye can be altered and makes the adjustment of different eye pressures possible. These induced changes of the eye pressure and their influence on the fundus can be checked. We have taken some measurements on enucleated human eyes to compare our device with a Statham tansducer in the vitreous. We found a good correlation. We are currently taking measurements in volunteers. The clinical relevance of these observations and measurements will be examined in a future study.

  17. Shoe allergic contact dermatitis.

    PubMed

    Matthys, Erin; Zahir, Amir; Ehrlich, Alison

    2014-01-01

    Foot dermatitis is a widespread condition, affecting men and women of all ages. Because of the location, this condition may present as a debilitating problem to those who have it. Allergic contact dermatitis involving the feet is frequently due to shoes or socks. The allergens that cause shoe dermatitis can be found in any constituent of footwear, including rubber, adhesives, leather, dyes, metals, and medicaments. The goal of treatment is to identify and minimize contact with the offending allergen(s). The lack of product information released from shoe manufacturers and the continually changing trends in footwear present a challenge in treating this condition. The aim of this study is to review the current literature on allergic contact shoe dermatitis; clinical presentation, allergens, patch testing, and management will be discussed. PubMed and MEDLINE databases were used for the search, with a focus on literature updates from the last 15 years.

  18. Acrylate Systemic Contact Dermatitis.

    PubMed

    Sauder, Maxwell B; Pratt, Melanie D

    2015-01-01

    Acrylates, the 2012 American Contact Dermatitis Society allergen of the year, are found in a range of products including the absorbent materials within feminine hygiene pads. When fully polymerized, acrylates are nonimmunogenic; however, if not completely cured, the monomers can be potent allergens.A 28-year-old woman is presented, who had her teeth varnished with Isodan (Septodont, Saint-Maur-des-Fossés, France) containing HEMA (2-hydroxyethyl methacrylate) with no initial reaction. Approximately 1 month later, the patient developed a genital dermatitis secondary to her feminine hygiene pads. The initial reaction resolved, but 5 months later, the patient developed a systemic contact dermatitis after receiving a second varnishing.The patient was dramatically patch test positive to many acrylates. This case demonstrates a reaction to likely unpolymerized acrylates within a feminine hygiene pad, as well as broad cross-reactivity or cosensitivity to acrylates, and possibly a systemic contact dermatitis with systemic re-exposure to unpolymerized acrylates.

  19. Mystery cloud of AD 536

    NASA Technical Reports Server (NTRS)

    Stothers, R. B.

    1984-01-01

    The possible cause of the densest and most persistent dry fog on record, which was observed in Europe and the Middle East during AD 536 and 537, is discussed. The fog's long duration toward the south and the high sulfuric acid signal detected in Greenland in ice cores dated around AD 540 support the theory that the fog was due to the explosion of the Rabaul volcano, the occurrence of which has been dated at about AD 540 by the radiocarbon method.

  20. Spa contact dermatitis.

    PubMed

    Yankura, Jessica A; Marks, James G; Anderson, Bryan E; Adams, David R

    2008-01-01

    Potassium monopersulfate (MPS) is widely used in spa and pool "shock" treatments, yet contact dermatitis associated with MPS has been rarely reported. A patient presented with a generalized scattered dermatitis from the neck down that worsened after spa use. Patch testing elicited a ++ reaction to ammonium persulfate. Contact with ammonium persulfate was ruled out; however, MPS, which can cross-react with ammonium persulfate, was found to be the active ingredient in the patient's spa shock treatments. The dermatitis cleared after the patient switched to a hydrogen peroxide-based shock treatment.

  1. Allergic Contact Dermatitis.

    PubMed

    Kostner, Lisa; Anzengruber, Florian; Guillod, Caroline; Recher, Mike; Schmid-Grendelmeier, Peter; Navarini, Alexander A

    2017-02-01

    Allergic contact dermatitis (ACD) is a common skin disease caused by a T cell-mediated immune reaction to usually innocuous allergens. ACD can have grave medical and socioeconomic consequences. ACD and irritant contact dermatitis often occur together. A detailed history and clinical examination are crucial and guide patch testing, which is the gold standard to diagnose ACD. T-cell clones persisting in the skin may explain the tendency of ACD to relapse even after years of allergen avoidance. Traditional treatments for ACD are topical steroids, calcineurin inhibitors, phototherapy, retinoids (including the recent alitretinoin), and immunosuppressants. Targeted therapies are lacking.

  2. Application of winglets and/or wing tip extensions with active load control on the Boeing 747

    NASA Technical Reports Server (NTRS)

    Allison, R. L.; Perkin, B. R.; Schoenman, R. L.

    1978-01-01

    The application of wing tip modifications and active control technology to the Boeing 747 airplane for the purpose of improving fuel efficiency is considered. Wing tip extensions, wing tip winglets, and the use of the outboard ailerons for active wing load alleviation are described. Modest performance improvements are indicated. A costs versus benefits approach is taken to decide which, if any, of the concepts warrant further development and flight test leading to possible incorporation into production airplanes.

  3. Design, ancillary testing, analysis and fabrication data for the advanced composite stabilizer for Boeing 737 aircraft, volume 2

    NASA Technical Reports Server (NTRS)

    Aniversario, R. B.; Harvey, S. T.; Mccarty, J. E.; Parsons, J. T.; Peterson, D. C.; Pritchett, L. D.; Wilson, D. R.; Wogulis, E. R.

    1982-01-01

    Results of tests conducted to demonstrate that composite structures save weight, possess long term durability, and can be fabricated at costs competitive with conventional metal structures are presented with focus on the use of graphite-epoxy in the design of a stabilizer for the Boeing 737 aircraft. Component definition, materials evaluation, material design properties, and structural elements tests are discussed. Fabrication development, as well as structural repair and inspection are also examined.

  4. Coset construction of AdS particle dynamics

    NASA Astrophysics Data System (ADS)

    Heinze, Martin; Jorjadze, George; Megrelidze, Luka

    2017-01-01

    We analyze the dynamics of the AdSN+1 particle realized on the coset SO(2, N)/SO (1,N). Hamiltonian reduction provides the physical phase space in terms of the coadjoint orbit obtained by boosting a timelike element of 𝔰𝔬(2, N). We show equivalence of this approach to geometric quantization and to the SO(N) covariant oscillator description, for which the boost generators entail a complicated operator ordering. As an alternative scheme, we introduce dual oscillator variables and derive their algebra at the classical and the quantum levels. This simplifies the calculations of the commutators for the boost generators and leads to unitary irreducible representations of 𝔰𝔬(2, N) for all admissible values of the mass parameter. We furthermore discuss an SO(N) covariant supersymmetric extension of the oscillator quantization, with its realization for superparticles in AdS2 and AdS3 given by recent works.

  5. Entanglement temperature and perturbed AdS3 geometry

    NASA Astrophysics Data System (ADS)

    Levine, G. C.; Caravan, B.

    2016-06-01

    Generalizing the first law of thermodynamics, the increase in entropy density δ S (x ) of a conformal field theory (CFT) is proportional to the increase in energy density, δ E (x ) , of a subsystem divided by a spatially dependent entanglement temperature, TE(x ) , a fixed parameter determined by the geometry of the subsystem, crossing over to thermodynamic temperature at high temperatures. In this paper we derive a generalization of the thermodynamic Clausius relation, showing that deformations of the CFT by marginal operators are associated with spatial temperature variations, δ TE(x ) , and spatial energy correlations play the role of specific heat. Using AdS/CFT duality we develop a relationship between a perturbation in the local entanglement temperature of the CFT and the perturbation of the bulk AdS metric. In two dimensions, we demonstrate a method through which direct diagonalizations of the boundary quantum theory may be used to construct geometric perturbations of AdS3 .

  6. AdS5 backgrounds with 24 supersymmetries

    NASA Astrophysics Data System (ADS)

    Beck, S.; Gutowski, J.; Papadopoulos, G.

    2016-06-01

    We prove a non-existence theorem for smooth AdS 5 solutions with connected, compact without boundary internal space that preserve strictly 24 supersymmetries. In particular, we show that D = 11 supergravity does not admit such solutions, and that all such solutions of IIB supergravity are locally isometric to the AdS 5 × S 5 maximally supersymmetric background. Furthermore, we prove that (massive) IIA supergravity also does not admit such solutions, provided that the homogeneity conjecture for massive IIA supergravity is valid. In the context of AdS/CFT these results imply that if gravitational duals for strictly mathcal{N}=3 superconformal theories in 4-dimensions exist, they are either singular or their internal spaces are not compact.

  7. Have Confidence in Contact

    ERIC Educational Resources Information Center

    Crisp, Richard J.; Turner, Rhiannon N.

    2010-01-01

    In an article in the May-June 2009 "American Psychologist," we discussed a new approach to reducing prejudice and encouraging more positive intergroup relations (Crisp & Turner, 2009). We named the approach imagined intergroup contact and defined it as "the mental simulation of a social interaction with a member or members of an outgroup category"…

  8. Compact contacting device

    NASA Technical Reports Server (NTRS)

    Acharya, Arun (Inventor); Gottzmann, Christian F. (Inventor); Lockett, Michael J. (Inventor); Schneider, James S. (Inventor); Victor, Richard A. (Inventor); Zawierucha, Robert (Inventor)

    1994-01-01

    An apparatus comprising a rotatable mass of structured packing for mass or heat transfer between two contacting fluids of different densities wherein the packing mass is made up of corrugated sheets of involute shape relative to the axis of the packing mass and form a logarithmic spiral curved counter to the direction of rotation.

  9. Contact: Releasing the news

    NASA Astrophysics Data System (ADS)

    Pinotti, Roberto

    The problem of mass behavior after man's future contacts with other intelligences in the universe is not only a challenge for social scientists and political leaders all over the world, but also a cultural time bomb as well. In fact, since the impact of CETI (Contact with Extraterrestrial Intelligence) on human civilization, with its different cultures, might cause a serious socio-anthropological shock, a common and predetermined worldwide strategy is necessary in releasing the news after the contact, in order to keep possible manifestations of fear, panic and hysteria under control. An analysis of past studies in this field and of parallel historical situations as analogs suggests a definite "authority crisis" in the public as a direct consequence of an unexpected release of the news, involving a devastating "chain reaction" process (from both the psychological and sociological viewpoints) of anomie and maybe the collapse of today's society. The only way to prevent all this is to prepare the world's public opinion concerning contact before releasing the news, and to develop a long-term strategy through the combined efforts of scientists, political leaders, intelligence agencies and the mass media, in order to create the cultural conditions in which a confrontation with ETI won't affect mankind in a traumatic way. Definite roles and tasks in this multi-level model are suggested.

  10. Disproportionate Minority Contact.

    PubMed

    Fix, Rebecca L; Cyperski, Melissa A; Burkhart, Barry R

    2017-04-01

    The overrepresentation of racial/ethnic minorities within the criminal justice system relative to their population percentage, a phenomenon termed disproportionate minority contact, has been examined within general adult and adolescent offender populations; yet few studies have tested whether this phenomenon extends to juvenile sexual offenders (JSOs). In addition, few studies have examined whether offender race/ethnicity influences registration and notification requirements, which JSOs are subject to in some U.S. states. The present study assessed for disproportionate minority contact among general delinquent offenders and JSOs, meaning it aimed to test whether the criminal justice system treats those accused of sexual and non-sexual offenses differently by racial/ethnic group. Furthermore, racial/ethnic group differences in risk, legal classification, and sexual offending were examined for JSOs. Results indicated disproportionate minority contact was present among juveniles with non-sexual offenses and JSOs in Alabama. In addition, offense category and risk scores differed between African American and European American JSOs. Finally, registration classifications were predicted by offending characteristics, but not race/ethnicity. Implications and future directions regarding disproportionate minority contact among JSOs and social and legal policy affecting JSOs are discussed.

  11. Lubrication Of Nonconformal Contacts

    NASA Technical Reports Server (NTRS)

    Jeng, Yeau-Ren

    1991-01-01

    Report discusses advances in knowledge of lubrication of nonconformal contacts in bearings and other machine elements. Reviews previous developments in theory of lubrication, presents advances in theory of lubrication to determine minimum film thickness, and describes experiments designed to investigate one of regimes of lubrication for ball bearings.

  12. Thermal Contact Conductance

    NASA Technical Reports Server (NTRS)

    Salerno, Louis J.; Kittel, Peter

    1997-01-01

    The performance of cryogenic instruments is often a function of their operating temperature. Thus, designers of cryogenic instruments often are required to predict the operating temperature of each instrument they design. This requires accurate thermal models of cryogenic components which include the properties of the materials and assembly techniques used. When components are bolted or otherwise pressed together, a knowledge of the thermal performance of such joints are also needed. In some cases, the temperature drop across these joints represents a significant fraction of the total temperature difference between the instrument and its cooler. While extensive databases exist on the thermal properties of bulk materials, similar databases for pressed contacts do not. This has often lead to instrument designs that avoid pressed contacts or to the over-design of such joints at unnecessary expense. Although many people have made measurements of contact conductances at cryogenic temperatures, this data is often very narrow in scope and even more often it has not been published in an easily retrievable fashion, if published at all. This paper presents a summary of the limited pressed contact data available in the literature.

  13. Exploring the bulk in AdS /CFT : A covariant approach

    NASA Astrophysics Data System (ADS)

    Engelhardt, Netta

    2017-03-01

    I propose a general, covariant way of defining when one region is "deeper in the bulk" than another. This definition is formulated outside of an event horizon (or in the absence thereof) in generic geometries; it may be applied to both points and surfaces, and it may be used to compare the depth of bulk points or surfaces relative to a particular boundary subregion or relative to the entire boundary. Using the recently proposed "light-cone cut" formalism, the comparative depth between two bulk points can be determined from the singularity structure of Lorentzian correlators in the dual field theory. I prove that, by this definition, causal wedges of progressively larger regions probe monotonically deeper in the bulk. The definition furthermore matches expectations in pure AdS and in static AdS black holes with isotropic spatial slices, where a well-defined holographic coordinate exists. In terms of holographic renormalization group flow, this new definition of bulk depth makes contact with coarse graining over both large distances and long time scales.

  14. The exceptional generalised geometry of supersymmetric AdS flux backgrounds

    NASA Astrophysics Data System (ADS)

    Ashmore, Anthony; Petrini, Michela; Waldram, Daniel

    2016-12-01

    We analyse generic AdS flux backgrounds preserving eight supercharges in D = 4 and D = 5 dimensions using exceptional generalised geometry. We show that they are described by a pair of globally defined, generalised structures, identical to those that appear for flat flux backgrounds but with different integrability conditions. We give a number of explicit examples of such "exceptional Sasaki-Einstein" backgrounds in type IIB supergravity and M-theory. In particular, we give the complete analysis of the generic AdS5 M-theory backgrounds. We also briefly discuss the structure of the moduli space of solutions. In all cases, one structure defines a "generalised Reeb vector" that generates a Killing symmetry of the background corresponding to the R-symmetry of the dual field theory, and in addition encodes the generic contact structures that appear in the D = 4 M-theory and D = 5 type IIB cases. Finally, we investigate the relation between generalised structures and quantities in the dual field theory, showing that the central charge and R-charge of BPS wrapped-brane states are both encoded by the generalised Reeb vector, as well as discussing how volume minimisation (the dual of a- and F-maximisation) is encoded.

  15. Lorentzian AdS geometries, wormholes, and holography

    SciTech Connect

    Arias, Raul E.; Silva, Guillermo A.; Botta Cantcheff, Marcelo

    2011-03-15

    We investigate the structure of two-point functions for the quantum field theory dual to an asymptotically Lorentzian Anti de Sitter (AdS) wormhole. The bulk geometry is a solution of five-dimensional second-order Einstein-Gauss-Bonnet gravity and causally connects two asymptotically AdS spacetimes. We revisit the Gubser-Klebanov-Polyakov-Witten prescription for computing two-point correlation functions for dual quantum field theories operators O in Lorentzian signature and we propose to express the bulk fields in terms of the independent boundary values {phi}{sub 0}{sup {+-}} at each of the two asymptotic AdS regions; along the way we exhibit how the ambiguity of normalizable modes in the bulk, related to initial and final states, show up in the computations. The independent boundary values are interpreted as sources for dual operators O{sup {+-}} and we argue that, apart from the possibility of entanglement, there exists a coupling between the degrees of freedom living at each boundary. The AdS{sub 1+1} geometry is also discussed in view of its similar boundary structure. Based on the analysis, we propose a very simple geometric criterion to distinguish coupling from entanglement effects among two sets of degrees of freedom associated with each of the disconnected parts of the boundary.

  16. Contact-resistance process cliff

    NASA Technical Reports Server (NTRS)

    Pina, C. A.

    1985-01-01

    Several approaches were investigated to obtain a measure of the quality of the contact resistance between metal and a diffused or polysilicon layer. These approaches have included the use of both short and very long contact strings as well as arays of contacts with different sizes to determine the contact resistance process cliff. Results from these approaches are discussed.

  17. Allergic contact dermatitis in children.

    PubMed

    Fontana, E; Belloni Fortina, A

    2014-12-01

    Allergic contact dermatitis is an inflammatory skin disease (delayed type hypersensitivity reaction) that accounts for up to 20% of all childhood dermatitis. Allergic contact dermatitis represents a clinical manifestation of contact sensitization and usually occurs at skin sites that have come into contact with the allergen. The clinical features of allergic contact dermatitis are itchy eczematous lesions. Prevalence of contact sensitization varies between 27% and 96% of children with suspected contact dermatitis. The relationship between contact sensitization and atopic dermatitis has been widely discussed but only conflicting data have been reported. Epicutaneous patch testing is the gold standard for the diagnosis of allergic contact dermatitis. The most common allergens detected in children are: metals, topical medicaments, fragrances, and preservatives. The first line management of allergic contact dermatitis in children is to avoid the offending allergens identified with the patch test and a topical corticosteroid therapy.

  18. [Contact dermatitis from Agave americana].

    PubMed

    de la Cueva, Pablo; González-Carrascosa, Mateo; Campos, Minia; Leis, Vicente; Suárez, Ricardo; Lázaro, Pablo

    2005-10-01

    Numerous plant species and their derivatives can cause skin reactions through a variety of mechanisms: irritative contact dermatitis, allergic contact dermatitis, contact urticaria and photodermatitis. We present a case of irritative contact dermatitis after exposure to the sap of Agave americana. The skin symptoms in this case have only been described on rare occasions; although this condition usually presents with a papulovesicular rash, in this patient it appeared as purpuric lesions in the contact area.

  19. Experimental and Computational Sonic Boom Assessment of Boeing N+2 Low Boom Models

    NASA Technical Reports Server (NTRS)

    Durston, Donald A.; Elmiligui, Alaa; Cliff, Susan E.; Winski, Courtney S.; Carter, Melissa B.; Walker, Eric L.

    2015-01-01

    Near-field pressure signatures were measured and computational predictions made for several sonic boom models representing Boeing's Quiet Experimental Validation Concept (QEVC) supersonic transport, as well as three axisymmetric calibration models. Boeing developed the QEVC under a NASA Research Announcement (NRA) contract for Experimental Systems Validations for N+2 Supersonic Commercial Transport Aircraft, which was led by the NASA High Speed Project under the Fundamental Aeronautics Program. The concept was designed to address environmental and performance goals given in the NRA, specifically for low sonic boom loudness levels and high cruise efficiency, for an aircraft anticipated to enter service in the 2020 timeframe. Wind tunnel tests were conducted on the aircraft and calibration models during Phases I and II of the NRA contract from 2011 to 2013 in the NASA Ames 9- by 7-Foot and NASA Glenn 8- by 6-Foot Supersonic Wind Tunnels. Sonic boom pressure signatures were acquired primarily at Mach 1.6 and 1.8, and force and moment data were acquired from Mach 0.8 to 1.8. The sonic boom test data were obtained using a 2-in. flat-top pressure rail and a 14-in. round-top tapered "reflection factor 1" (RF1) pressure rail. Both rails capture an entire pressure signature in one data point, and successive signatures at varying positions along or above the rail were used to improve data quality through spatial averaging. The sonic boom data obtained by the rails were validated with high-fidelity numerical simulations of off-body pressures using the CFD codes USM3D, Cart3D, and OVERFLOW. The test results from the RF1 rail showed good agreement between the computational and experimental data when a variety of testing techniques including spatial averaging of a series of pressure signatures were employed, however, reflections off the 2-in. flat-top rail caused distortions in the signatures that did not agree with the CFD predictions. The 9 x 7 and 8 x 6 wind tunnels generally

  20. Contact Graph Routing

    NASA Technical Reports Server (NTRS)

    Burleigh, Scott C.

    2011-01-01

    Contact Graph Routing (CGR) is a dynamic routing system that computes routes through a time-varying topology of scheduled communication contacts in a network based on the DTN (Delay-Tolerant Networking) architecture. It is designed to enable dynamic selection of data transmission routes in a space network based on DTN. This dynamic responsiveness in route computation should be significantly more effective and less expensive than static routing, increasing total data return while at the same time reducing mission operations cost and risk. The basic strategy of CGR is to take advantage of the fact that, since flight mission communication operations are planned in detail, the communication routes between any pair of bundle agents in a population of nodes that have all been informed of one another's plans can be inferred from those plans rather than discovered via dialogue (which is impractical over long one-way-light-time space links). Messages that convey this planning information are used to construct contact graphs (time-varying models of network connectivity) from which CGR automatically computes efficient routes for bundles. Automatic route selection increases the flexibility and resilience of the space network, simplifying cross-support and reducing mission management costs. Note that there are no routing tables in Contact Graph Routing. The best route for a bundle destined for a given node may routinely be different from the best route for a different bundle destined for the same node, depending on bundle priority, bundle expiration time, and changes in the current lengths of transmission queues for neighboring nodes; routes must be computed individually for each bundle, from the Bundle Protocol agent's current network connectivity model for the bundle s destination node (the contact graph). Clearly this places a premium on optimizing the implementation of the route computation algorithm. The scalability of CGR to very large networks remains a research topic