AD Amdt-39-13410
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | JT9D-3A | Airworthiness Directives; Pratt & Whitney JT9D-3A, -7, -7A, -7F, -7H, -7AH, and -7J Turbofan Engines |
Unsafe Condition
Errors in depicted clamping configuration for the gearbox pressure tube and No. 4 bearing front pressure manifold, which could lead to failed components and engine fires.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect clamp assemblies (P/Ns ST1594-06, ST1594-08, ST1594-10) for correct positioning, wear, and damage. Replace clamps if necessary. Visually inspect the gearbox pressure tube (P/N 697896) and No. 4 bearing front pressure manifold (P/N 670663) for nicks, dents, corrosion, or leaks. Repair or replace if rejected. Optional: Measure dent depth on tubing as an alternative to the ball bearing inspection method.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 250 hours-in-service or at the next shop visit, whichever occurs first, after December 18, 2003.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT9D-3A, -7, -7A, -7F, -7H, -7AH, and -7J turbofan engines with gearbox pressure tube (P/N 697896) and No. 4 bearing front pressure manifold (P/N 670663) installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.