Business · 08/12/1997

Pratt & Whitney JT9D-7R4 Series Turbofan Engines: Revised Airworthiness Directive to Address Cracks in Diffuser Case Assembly

The Federal Aviation Administration (FAA) has revised an earlier proposed airworthiness directive for Pratt & Whitney JT9D-7R4 series turbofan engines to include initial and repetitive on-wing eddy current inspections for cracks, as well as replacement with serviceable parts, in an effort to prevent diffuser case assembly rupture and subsequent engine failure, fire, and aircraft damage.