Transport i lotnictwo · 08/12/1997
Pratt & Whitney JT9D Series Turbofan Engines: New Airworthiness Directive Aims to Prevent Engine Failure
The Federal Aviation Administration (FAA) has issued a new airworthiness directive (AD) requiring Pratt & Whitney JT9D series turbofan engines to undergo initial and repetitive fluorescent penetrant inspection (FPI) for cracks in cooling air holes and tie bolt holes, in an effort to prevent turbine disk failure and potential engine failure.