AD 98-19-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | PW4052 | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| engine | Pratt & Whitney Division | PW4056 | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| engine | Pratt & Whitney Division | PW4060 | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| engine | Pratt & Whitney Division | PW4060A | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| engine | Pratt & Whitney Division | PW4062 | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| engine | Pratt & Whitney Division | PW4152 | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| engine | Pratt & Whitney Division | PW4156A | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| engine | Pratt & Whitney Division | PW4158 | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| engine | Pratt & Whitney Division | PW4164 | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| engine | Pratt & Whitney Division | PW4168 | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
Unsafe Condition
Cracking of the 2nd stage high pressure turbine (HPT) rotating airseals could result in an uncontained engine failure and damage to the aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect 2nd stage HPT rotating airseals using fluorescent penetrant and eddy current methods for cracks, remove cracked parts, replace with serviceable parts, modify 2nd stage ring segments and vane clusters, and install improved airseals per specified service bulletins.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next hot section shop visit after the effective date (November 9, 1998), and at each subsequent hot section shop visit. Modifications must be completed within 6 years after the effective date.
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Affected Aircraft
Pratt & Whitney Models PW4052, PW4056, PW4060, PW4060A, PW4062, PW4152, PW4156A, PW4158, PW4460, PW4462, PW4164, and PW4168 turbofan engines with 2nd stage HPT rotating airseals, Part Numbers 50L156 or 50L195 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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