Regulation & law · 14/12/2000

Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines

The Federal Aviation Administration (FAA) has issued an airworthiness directive requiring certain Pratt & Whitney PW4000 turbofan engines to be replaced with new or modified seals due to reports of cracks in the low pressure turbine 4th stage air seals, in order to prevent engine failure and damage to the airplane.