AD Amdt-39-10872
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | JT9D Series | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
Unsafe Condition
Reports of weld rework performed in the outer case wall of the turbine exhaust case (TEC), in the mount lug fillet area during original production, to address local under minimum wall thickness conditions, which have left the TEC's structural capability compromised.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct a one-time acid etch inspection of the TEC wall between and on either side of the 'R' and 'S' rails in the engine mount lug area (top quadrant of the case) for the presence of weld material. If weld material is detected, remove the engine from service and replace with serviceable parts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next removal of the TEC from the low pressure turbine case 'P' flange for maintenance after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT9D series turbofan engines, models JT9D-7, -7A, -7H, -7AH, -7F, -7J, -20, -20J, -7Q, -7Q3, -59A, -70A, and -7R4D.
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
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