AD 90-23-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT9D-20 | PRATT & WHITNEY Models JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/ -7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 Engines |
| engine | Pratt & Whitney Division | JT9D-20J | PRATT & WHITNEY Models JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/ -7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 Engines |
| engine | Pratt & Whitney Division | JT9D-3A | PRATT & WHITNEY Models JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/ -7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 Engines |
| engine | Pratt & Whitney Division | JT9D-7 | PRATT & WHITNEY Models JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/ -7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 Engines |
| engine | Pratt & Whitney Division | JT9D-7A | PRATT & WHITNEY Models JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/ -7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 Engines |
| engine | Pratt & Whitney Division | JT9D-7AH | PRATT & WHITNEY Models JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/ -7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 Engines |
| engine | Pratt & Whitney Division | JT9D-7F | PRATT & WHITNEY Models JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/ -7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 Engines |
| engine | Pratt & Whitney Division | JT9D-7H | PRATT & WHITNEY Models JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/ -7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 Engines |
| engine | Pratt & Whitney Division | JT9D-7J | PRATT & WHITNEY Models JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/ -7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 Engines |
| engine | Pratt & Whitney Division | JT9D-7R4D | PRATT & WHITNEY Models JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/ -7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 Engines |
Unsafe Condition
Failure of the high pressure turbine (HPT) stage one rotating air seal could result in an uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service specific HPT stage one rotating air seals with listed part numbers and serial numbers, inspect others via fluorescent penetrant inspection (FPI), and replace cracked parts. Compliance must follow specific service bulletins and timelines based on engine model, including deadlines within 60 days, 2,350 cycles, 2,450 cycles, or 2,900 cycles in service, or at the next shop visit or HPT module exposure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within specified deadlines based on engine model: 60 days, 2,350 cycles, 2,450 cycles, or 2,900 cycles in service from the effective date (November 23, 1990), or at the next engine shop visit or HPT module exposure, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT9D-3A/-7/-7A/-7A(SP)/-7AH/-7F/-7H/-7J/-20/-20J/-7R4D/-7R4D1/-7R4E/-7R4E1/-7R4E4/-7R4H1/-7R4G2 engines installed on Boeing 767, Boeing 747, McDonnell Douglas DC10-40, 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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