AD 2015-22-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Division | Airworthiness Directives; Pratt & Whitney Division Turbofan Engines |
Unsafe Condition
cracks in the barrel section of the LPT 4th stage IAS which could, if not corrected, result in uncontained IAS release, damage to the engine, and damage to the aircraft.
Required Actions
remove from service the LPT 4th stage IAS, P/N 51N038, at each LPT overhaul after the effective date of this AD, and at each engine shop visit after the effective date of this AD, remove from service the LPT 4th stage IAS, P/N 51N038, if it has more than 10,900 cycles since new.
Compliance Time
Within 10,900 cycles since new or at each LPT overhaul after the effective date of this AD.
Affected Aircraft
All Pratt & Whitney Division PW4164, PW4168, PW4168A, PW4164C, PW4164C/B, PW4164-1D, PW4168-1D, PW4168A-1D, PW4170, PW4164C-1D, and PW4164C/B-1D turbofan engines with a low-pressure turbine (LPT) 4th stage inner air seal (IAS), part number (P/N) 51N038, installed, and all PW4050, PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4152, PW4156, PW4156A, PW4158, PW4160, PW4460, PW4462, and PW4650 turbofan engines including models with a ``-3'' suffix with an LPT 4th stage IAS, P/N 51N038, installed.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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