AD 85-12-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT9D-3A | PRATT & WHITNEY AIRCRAFT Models JT9D-3A, -7, -7H, -7A, -7AH, -7F, and -7J Series Engines |
| engine | Pratt & Whitney Division | JT9D-7 | PRATT & WHITNEY AIRCRAFT Models JT9D-3A, -7, -7H, -7A, -7AH, -7F, and -7J Series Engines |
| engine | Pratt & Whitney Division | JT9D-7A | PRATT & WHITNEY AIRCRAFT Models JT9D-3A, -7, -7H, -7A, -7AH, -7F, and -7J Series Engines |
| engine | Pratt & Whitney Division | JT9D-7AH | PRATT & WHITNEY AIRCRAFT Models JT9D-3A, -7, -7H, -7A, -7AH, -7F, and -7J Series Engines |
| engine | Pratt & Whitney Division | JT9D-7F | PRATT & WHITNEY AIRCRAFT Models JT9D-3A, -7, -7H, -7A, -7AH, -7F, and -7J Series Engines |
| engine | Pratt & Whitney Division | JT9D-7H | PRATT & WHITNEY AIRCRAFT Models JT9D-3A, -7, -7H, -7A, -7AH, -7F, and -7J Series Engines |
| engine | Pratt & Whitney Division | JT9D-7J | PRATT & WHITNEY AIRCRAFT Models JT9D-3A, -7, -7H, -7A, -7AH, -7F, and -7J Series Engines |
Unsafe Condition
Centrifugal Oil Filter (COF) bearing failures which may initiate main gearbox fires
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the COF, related gears, bearings, and attaching hardware from the main gearbox per PWA SB 5486, Revision 3, or FAA approved equivalent. Alternative means of compliance may be approved upon request.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than December 31, 1988
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney Aircraft JT9D-3A, -7, -7H, -7A, -7AH, -7F, and -7J series turbofan engines
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.