AD 86-09-01 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT9D-20 | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 Series Engines |
| engine | Pratt & Whitney Division | JT9D-3A | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 Series Engines |
| engine | Pratt & Whitney Division | JT9D-59A | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7 | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 Series Engines |
| engine | Pratt & Whitney Division | JT9D-70A | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7A | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7AH | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7F | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7H | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7J | PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 Series Engines |
Unsafe Condition
Low pressure turbine (LPT) case penetration that can result from turbine vane antirotation pin failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Radioisotope inspect and remove from service or reinspect stainless steel antirotation pins in LPT cases. Replace stainless steel pins with nickel alloy pins when removed from service, at next LPT module shop visit after May 13, 1986, or by December 31, 1989. Incorporate additional antirotation pins in fourth, fifth, and sixth stage stator locations for JT9D-59A, -70A, -7Q, and -7Q3 engines at next LPT module shop visit after May 13, 1986, or by December 31, 1989.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 750 hours time in service (TIS) after the effective date of this AD or within 4,000 hours TIS since the last LPT module shop visit, whichever occurs later
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, -59A, -70A, -7Q, and -7Q3 series 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.