AD 89-10-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT9D-20 | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 Engines |
| engine | Pratt & Whitney Division | JT9D-3A | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 Engines |
| engine | Pratt & Whitney Division | JT9D-7 | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 Engines |
| engine | Pratt & Whitney Division | JT9D-7A | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 Engines |
| engine | Pratt & Whitney Division | JT9D-7AH | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 Engines |
| engine | Pratt & Whitney Division | JT9D-7F | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 Engines |
| engine | Pratt & Whitney Division | JT9D-7H | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 Engines |
| engine | Pratt & Whitney Division | JT9D-7J | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 Engines |
Unsafe Condition
Diffuser case Number 4 or Number 7 strut failure that can cause a Number 3 bearing compartment fire and subsequent nacelle fire.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install strut insert assembly Part Number 804698-01 into both the Number 4 and Number 7 diffuser case struts in accordance with PW Service Bulletin 5730 dated February 4, 1987, at the next engine shop visit after the effective date of this AD, but not later than August 31, 1991.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
at the next engine shop visit after the effective date of this AD, but not later than August 31, 1991
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 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
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