AD 2013-15-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Division | Airworthiness Directives; Pratt & Whitney Division Turbofan Engines |
Unsafe Condition
Cracks in second-stage high-pressure turbine (HPT) air seals, which could lead to failure of the air seal and an uncontained engine failure, potentially causing damage to the airplane.
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Required Actions
Inspect second-stage HPT air seals using eddy current inspection (ECI) or fluorescent-penetrant inspection (FPI). Remove from service any air seals that fail inspection. Disposition results according to the inspection criteria.
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Compliance Time
Within five cycles after discovery of a failed inspection.
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Affected Aircraft
Pratt & Whitney Division turbofan engines, models PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3, with a certain second-stage HPT air seal part number installed.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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