AD 2025-05-13: Pratt & Whitney Canada Corp. Engines

What the FAA requires

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 the gas generator case to turbine support case retaining bolts for evidence of bolt cracks, bolt fracture, missing bolts, or loose bolts and replacement, if necessary, as specified in a Transport Canada AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

Read the full directive on the Federal Register →

Applicability

This AD applies to Pratt & Whitney Canada Corp. (P&WC) Model PW535E and PW535E1 engines, as identified in Transport Canada Civil Aviation AD CF-2023-60, dated August 14, 2023 (Transport Canada AD CF-2023-60). (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Section. (e) Unsafe Condition This AD was prompted by a manufacturer design review that indicated certain flange bolts securing the gas generator case and turbine support case have an inadequate low-cycle fatigue life. The FAA is issuing this AD to prevent crack, fracture, missing, or loosening of the gas generator case to turbine support case retaining bolts. The unsafe condition, if not addressed, could result in un

Part numbers this directive names (2)

Extracted from the directive text. For each: the NSN cross-reference where one exists, sellers listing it here, and open DLA solicitations on the NSN.