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FAA AD ON PRATT&WHITNEY HELICOPTERS TURBOSHAFT ENGINES
USA, Novel or Unusual Design Features The Pratt & Whitney engine model PT6T-9 turboshaft engine model incorporates two power-sections coupled to a common gearbox, and will have engine ratings for 30-second OEI, 2-minute OEI, and continuous OEI operations when one power-section is inoperative. The requirements of the original type certification basis do not provide adequate or appropriate...
AVIONEWS - World Aeronautical Press Agency