AD 2017-05-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Division | Airworthiness Directives; Pratt & Whitney Division Turbofan Engines |
Unsafe Condition
Uncontained failure of a high-pressure turbine (HPT) hub during takeoff, caused by a machining anomaly in the aft web/rim fillet area of the HPT 1st stage hub.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the surface condition of the aft side web/rim fillet of HPT 1st stage hubs and remove from service hubs that fail inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next engine shop visit or next time the engine is disassembled sufficiently to expose the HPT module, depending on the engine model.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney Division PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 turbofan engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.