Airworthiness Directive · Amendment 39-11333 · Pratt & Whitney PW2000 Series Turbofan Engines
Pratt & Whitney PW2000 Series Turbofan Engines
Pratt & Whitney PW2037, PW2040, PW2037M, PW2240, and PW2337 series turbofan engines, installed on but not limited to Boeing 757 and Ilyushin IL-96T series airplanes.
This amendment adopts a new airworthiness directive (AD), applicable to Pratt & Whitney (PW) PW2000 series turbofan engines, that requires initial and repetitive inspections of certain High Pressure Turbine (HPT) stage 1 and stage 2 disks utilizing an improved ultrasonic inspection method performed at an approved facility when the disk is exposed during a shop visit, and if a crack indicating a subsurface anomaly is found, removal from service and replacement with a serviceable part. This amendment is prompted by the results of a stage 1 HPT disk fracture investigation, which has identified a population of HPT stage 1 and 2 disks that may have subsurface anomalies formed during a forging process. The actions specified by this AD are intended to prevent HPT disk fracture, which could result in an uncontained engine failure, and 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.
