AD 97-19-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT8D-1 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-11 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-15 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-17 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-17R | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-1A | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-1B | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-7 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-7A | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-7B | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
Unsafe Condition
Uncontained release of a 4th stage low pressure turbine (LPT) blade due to hub cracking, which can 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
Perform fluorescent penetrant inspection (FPI) and eddy current inspection (ECI) of affected 4th stage LPT hubs for cracks when the hub is removed from the module and debladed. Replace any cracked hubs with serviceable parts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next time after the effective date of this AD that the hub is removed from the module and has been debladed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, -11, -15, -17, and -17R turbofan engines with 4th stage LPT hubs identified by serial number in Table A of PW Alert Service Bulletin A6274, Revision 1.
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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