Airworthiness Directive · Amendment 39-8808 · Pratt & Whitney Canada Corp. Engines
Pratt & Whitney Canada Corp. Engines
This AD applies to Pratt & Whitney Canada Corp. PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, PW125B.
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) that is applicable to Pratt & Whitney Canada PW100 series turboprop engines. This action requires a life limit reduction for affected high pressure turbine (HPT) disks, and establishes a drawdown schedule for disks currently near, at, or greater than the new reduced service life. This amendment is prompted by reports of two HPT disk failures, one of which was uncontained. The actions specified in this AD are intended to prevent an uncontained HPT disk 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.
