EASA Regulations for Pratt & Whitney PW4100

EASA AD US-2021-22-14

Engine - Low-Pressure Turbine - Replacement / Inspection

Airworthiness Directive 2021-22-14 is a final rule issued by the FAA addressing certain Pratt & Whitney PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 turbofan engines. It mandates replacement and inspection requirements for the low-pressure turbine (LPT) 4th-stage air sealing ring segment assemblies and the LPT case to prevent unsafe conditions. This directive aims to enhance engine safety by addressing issues that could lead to blade fractures and engine damage.