Airworthiness Directive · Amendment 39-8878 · Pratt & Whitney Division Engines
Pratt & Whitney Division Engines
This AD applies to Pratt & Whitney Division JT9D-7R4D, JT9D-7R4D1, JT9D-7R4E, JT9D-7R4E1, JT9D-7R4E4, JT9D-7R4G2, JT9D-7R4H1.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD), applicable to Pratt & Whitney JT9D-7R4 series turbofan engines, that requires initial and repetitive fan blade leading edge inspections, and either installation of fan blade sets with modified fan blade shrouds or rework of the fan blade shrouds as a terminating action to the inspections. This amendment is prompted by reports of flutter-induced fan blade fractures. The actions specified by this AD are intended to prevent fan blade fracture and uncontained engine failure, resulting in possible damage to the aircraft.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
