AD 90-22-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | PW4050 | PRATT & WHITNEY Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4152, PW4156, PW4158, and PW4460 Engines |
| engine | Pratt & Whitney Division | PW4052 | PRATT & WHITNEY Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4152, PW4156, PW4158, and PW4460 Engines |
| engine | Pratt & Whitney Division | PW4056 | PRATT & WHITNEY Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4152, PW4156, PW4158, and PW4460 Engines |
| engine | Pratt & Whitney Division | PW4060 | PRATT & WHITNEY Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4152, PW4156, PW4158, and PW4460 Engines |
| engine | Pratt & Whitney Division | PW4060A | PRATT & WHITNEY Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4152, PW4156, PW4158, and PW4460 Engines |
| engine | Pratt & Whitney Division | PW4152 | PRATT & WHITNEY Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4152, PW4156, PW4158, and PW4460 Engines |
| engine | Pratt & Whitney Division | PW4156 | PRATT & WHITNEY Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4152, PW4156, PW4158, and PW4460 Engines |
| engine | Pratt & Whitney Division | PW4158 | PRATT & WHITNEY Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4152, PW4156, PW4158, and PW4460 Engines |
| engine | Pratt & Whitney Division | PW4460 | PRATT & WHITNEY Models PW4050, PW4052, PW4056, PW4060, PW4060A, PW4152, PW4156, PW4158, and PW4460 Engines |
Unsafe Condition
Low pressure turbine (LPT) shaft failure that can cause a total loss of thrust and inflight shutdown.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct a one-time eddy current inspection of the inner diameter bore surface of the LPT shaft between 23 and 44 inches forward of the aft end per PW ASB PW4ENG 72-328. Remove cracked shafts from service prior to further flight. Alternate methods may be approved via FAA submission.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to October 31, 1990 for engines in Table 2 of ASB; prior to December 31, 1990 for specified serial ranges; remove cracked shafts before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney PW4050, PW4052, PW4056, PW4060, PW4060A, PW4152, PW4156, PW4158, and PW4460 engines installed on Boeing 747, Boeing 767, Airbus A300, and Airbus A310 aircraft.
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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