Business · 04/08/2011

Pratt & Whitney Issues Airworthiness Directive for PW4074 and PW4077 Turbofan Engines

The Federal Aviation Administration (FAA) is requiring airlines to remove the 15th stage HPC disk from Pratt & Whitney (PW) Models PW4074 and PW4077 Turbofan Engines within 12,000 cycles or 12,000 civil service nose (CSN) hours after the effective date, to prevent potential engine failure and damage to the airplane.