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Airworthiness Directives; The Boeing Company Airplanes
We propose to adopt a new airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This proposed AD was prompted by a report of wire damage on a fuel boost pump power cable, and a separate report of a fuel tank explosion on a similarly equipped airplane. This proposed AD would...
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Airworthiness Directives; Zodiac Aerotechnics, Oxygen Mask Regulators
We propose to adopt a new airworthiness directive (AD) for certain Zodiac Aerotechnics oxygen mask regulators. This proposed AD was prompted by reports that certain silicon harness inflation hoses, installed on certain flight crew quick donning mask harnesses, have shown an unusually high premature rupture rate. This proposed AD would require...
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Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters
We propose to supersede airworthiness directive (AD) 2017-07- 02 for Sikorsky Aircraft Corporation (Sikorsky) Model 269D and Model 269D Configuration A helicopters. AD 2017-07-02 currently requires reducing the life limit of and inspecting certain drive shafts. This proposed AD would retain the requirements of AD 2017-07-02 and propose repeating...
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Airworthiness Directives; GE Aviation Czech s.r.o. Turboprop Engines
We propose to adopt a new airworthiness directive (AD) for certain GE Aviation Czech s.r.o. M601D-11, M601E-11, M601E-11A, M601E- 11AS, M601E-11S, and M601F turboprop engines. This proposed AD was prompted by a review that determined that certain power turbine (PT) rotors have less overspeed margin than originally declared during product...
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Airworthiness Directives; Rolls-Royce Corporation Turbofan Engines
We propose to adopt a new airworthiness directive (AD) for certain Rolls-Royce Corporation (RRC) AE 3007A and AE 3007C model turbofan engines. This proposed AD was prompted by an updated analysis that lowered the life limit of fan wheels installed on the affected engines. This proposed AD would require removal of the affected fan wheel at new,...
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Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Gulfstream Aerospace Corporation Models GIII (G-1159A), G-IV, and GIV-X airplanes. This proposed AD was prompted by a report that certain flap tracks were manufactured with the upper flange thickness less than design minimum. This proposed AD would require replacing any defective...
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Airworthiness Directives; Alexander Schleicher GmbH & Co. Segelflugzeugbau Gliders
We propose to adopt a new airworthiness directive (AD) for all Alexander Schleicher GmbH & Co. Segelflugzeugbau Models ASH 25M and ASH 26E gliders. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation...
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Airworthiness Directives; Agusta S.p.A. Helicopters
We propose to adopt a new airworthiness directive (AD) for Agusta S.p.A. Model AB139 and Model AW139 helicopters. This proposed AD would require inspecting the thickness of the tail gearbox (TGB) central housing (housing). This proposed AD is prompted by reports that the housing thickness does not conform to its type design. The actions of this...
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Airworthiness Criteria: Glider Design Criteria for DG Flugzeugbau GmbH Model DG-1000M Glider
This notice announces the availability of and requests comments on the proposed design criteria for the DG Flugzeugbau GmbH model DG-1000M glider. The Administrator finds the proposed design criteria, which make up the certification basis for the DG-1000M glider, acceptable. These final design criteria will be published in the Federal Register.
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Airworthiness Directives; Airbus Airplanes
We propose to adopt a new airworthiness directive (AD) for all Airbus Model A330-200 series airplanes, Model A330-200 Freighter series airplanes, and Model A330-300 series airplanes. This proposed AD was prompted by an evaluation by the design approval holder (DAH) indicating that certain fuselage structures are subject to widespread fatigue...
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Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters
We propose to adopt a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-76C helicopters. This proposed AD would require inspecting the engine collective position transducer (CPT). This proposed AD is prompted by reports of wear of the CPT that has resulted in several One Engine Inoperative (OEI) incidents. The...
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Airworthiness Directives; Bombardier, Inc., Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-2C10 (Regional Jet Series 700, 701, & 702), Model CL-600-2D15 (Regional Jet Series 705), Model CL-600- 2D24 (Regional Jet Series 900), and Model CL-600-2E25 (Regional Jet Series 1000) airplanes. This proposed AD was prompted by a report of a...
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Airworthiness Directives; Bombardier, Inc., Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes; Model CL-600-2D15 (Regional Jet Series 705) airplanes; Model CL-600-2D24 (Regional Jet Series 900) airplanes; and Model CL-600-2E25 (Regional Jet Series 1000) airplanes. This proposed AD was...
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Airworthiness Directives; Honeywell International Inc. Turboprop and Turboshaft Engines
We propose to adopt a new airworthiness directive (AD) for certain Honeywell International Inc. TPE331 turboprop and TSE331 turboshaft engines. This proposed AD was prompted by recent reports of failures of the direct drive fuel control gears and bearings in the hydraulic torque sensor gear assembly, part number (P/N) 3101726-3. This proposed AD...
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Airworthiness Directives; General Electric Company Turbofan Engines
We propose to adopt a new airworthiness directive (AD) for all General Electric Company (GE) CF6-80A, -80A1, -80A2, and -80A3 turbofan engines. This proposed AD was prompted by high cycle fatigue (HCF) cracking of the low-pressure turbine (LPT) stage 3 nozzles. This proposed AD would require replacement of the LPT stage 3 nozzles. We are...
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Airworthiness Directives; Airbus Helicopters
We propose to supersede airworthiness directive (AD) 2015-22- 53 for Airbus Helicopters (Airbus) Model AS350B3 helicopters. AD 2015- 22-53 requires revising the rotorcraft flight manual (RFM) to perform the yaw load compensator check after rotor shut-down and to state that the yaw servo hydraulic switch must be in the ``ON'' position before...
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Airworthiness Directives; Viking Air Limited Airplanes
We propose to adopt a new airworthiness directive (AD) for all Viking Air Limited Models DHC-2 Mk. I, DHC-2 Mk. II, and DHC-2 Mk. III airplanes. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation...
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Airworthiness Directives; General Electric Company Turbofan Engines
We propose to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) CF6-80A, CF6-80A1, CF6-80A2, CF6- 80A3, CF6-80C2A1, CF6-80C2A2, CF6-80C2A3, CF6-80C2A5, CF6-80C2A5F, CF6- 80C2A8, CF6-80C2B1, CF6-80C2B1F, CF6-80C2B1F1, CF6-80C2B1F2, CF6- 80C2B2, CF6-80C2B2F, CF6-80C2B3F, CF6-80C2B4, CF6-80C2B4F, CF6-80C2B5F,...
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Airworthiness Directives; General Electric Company Turbofan Engines
We propose to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) GEnx-1B64/P2, -1B67/P2, -1B70/P2, -1B70/75/P2, -1B70C/P2, and -1B74/75/P2 turbofan engines. This proposed AD was prompted by a report of the failure of the high-pressure turbine (HPT) stage 1 blade retainer and subsequent in-flight shutdown of the...
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Airworthiness Directives; The Boeing Company Airplanes
We propose to adopt a new airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This proposed AD was prompted by reports of cracking in the webs of the stub beams at certain fuselage stations. These cracks are the result of fatigue caused by cyclical loading from...