AD Amdt-39-11221
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | JT9D Series | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
Unsafe Condition
Reports of Combustion Chamber Outer Casing (CCOC) rupture due to cracking in the L-flange fillet radius.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Initial and repetitive in-shop eddy current and on-wing ultrasonic inspections of the CCOC forward flange (L-flange) fillet radius for cracking. Replace cracked L-flanges with serviceable parts. Replacement with an improved L-flange terminates repetitive inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Not specified in the provided text.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT9D series turbofan engines, as specified in the AD.
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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