AD 2012-16-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Division | Airworthiness Directives; Pratt & Whitney Division Turbofan Engines |
Unsafe Condition
Certain high-pressure turbine (HPT) stage 1 front hubs could initiate a crack prior to the published life limit, leading to failure of the HPT stage 1 front hub and potentially causing an uncontained engine failure and damage to the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the affected HPT stage 1 front hubs from service using a drawdown plan. The drawdown schedule is specified in the AD and must be followed to ensure compliance.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the specified drawdown schedule outlined in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney Division PW4052, PW4152, PW4056, PW4156A, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4158, PW4460, PW4462, PW4164, PW4164C, PW4164C/B, PW4168, and PW4168A turbofan engines with certain HPT stage 1 front hubs installed, as identified by part numbers and serial numbers in the referenced service bulletins.
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
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