AD 2025-05-13
Effective 04/23/2025 · Published 03/19/2025
Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Summary
The FAA is adopting a new airworthiness directive (AD) for certain Pratt & Whitney Canada Corp. (P&WC) Model PW535E and PW535E1 engines. This AD was prompted by a manufacturer design review that indicated certain flange bolts securing the gas generator case and turbine support case are susceptible to cracking at their current low- cycle fatigue (LCF) life. This AD requires repetitive borescope inspections (BSI) of t…