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976. Airworthiness Directives; Lockheed Model 1329 Series Airplanes

PROPOSED RULES: Lockheed,

The FAA proposes to adopt a new airworthiness directive (AD) for certain Lockheed Model 1329 series airplanes. This proposed AD would require repetitive inspections to detect crack damage in the front spar cap assembly of the lower vertical stabilizer; reworking the spar cap doublers if no crack damage is found during any inspection; and repairing
DEPARTMENT OF TRANSPORTATION : Federal Aviation Administration

977. Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145 Series Airplanes

PROPOSED RULES: Empresa Brasileira de Aeronautica S.A. (EMBRAER),

The FAA proposes to adopt a new airworthiness directive (AD) for certain EMBRAER Model EMB135 and 145 series airplanes. This proposed AD would require measuring the fillet radius dimension of the trunnion fitting webs of the wings; and reworking the fillet radius of the trunnion fitting web in order to increase the radius, doing related
DEPARTMENT OF TRANSPORTATION : Federal Aviation Administration

978. Airworthiness Directives; Rolls-Royce plc RB211 Trent 800 Series Turbofan Engines

RULES: Rolls-Royce plc,

The FAA is adopting a new airworthiness directive (AD) for RollsRoyce plc (RR) models RB211 Trent 87517, Trent 87717, Trent 88417, Trent 884B17, Trent 89217, Trent 892B17, and Trent 89517 turbofan engines with low pressure (LP) compressor fan blades part number (P/N) FW18548, installed. This AD requires LP compressor fan blade replacement with new
DEPARTMENT OF TRANSPORTATION : Federal Aviation Administration

979. Airworthiness Directives; Boeing Model 767-200, -300, and -300F Series Airplanes

PROPOSED RULES: Boeing,

The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 767200, 300, and 300F series airplanes. This proposed AD would require repetitive high frequency eddy current inspections and detailed inspections of the left and right butt line (BL) 25 vertical chords for cracks, and corrective actions if necessary. This
DEPARTMENT OF TRANSPORTATION : Federal Aviation Administration

980. Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines

PROPOSED RULES: Pratt & Whitney,

The FAA proposes to supersede an existing airworthiness directive (AD) for Pratt & Whitney (PW) PW4000 series turbofan engines. That AD currently requires revisions to the engine manufacturer's time limits section (TLS) to include enhanced inspection of selected critical lifelimited parts at each piecepart opportunity. This proposed AD would
DEPARTMENT OF TRANSPORTATION : Federal Aviation Administration

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