AD 91-24-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-6D | GENERAL ELECTRIC COMPANY Models (GE) CF6-6 Series Engines |
| engine | General Electric Company | CF6-6D1 | GENERAL ELECTRIC COMPANY Models (GE) CF6-6 Series Engines |
| engine | General Electric Company | CF6-6D1A | GENERAL ELECTRIC COMPANY Models (GE) CF6-6 Series Engines |
| engine | General Electric Company | CF6-6K | GENERAL ELECTRIC COMPANY Models (GE) CF6-6 Series Engines |
| engine | General Electric Company | CF6-6K2 | GENERAL ELECTRIC COMPANY Models (GE) CF6-6 Series Engines |
Unsafe Condition
Rupture of the compressor rear frame (CRF) casing that could result in an engine shutdown, aircraft damage, and aborted takeoff.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the CRF outer case compressor discharge pressure manifold port plug weld area for cracks at the next scheduled open cowl check, but not later than 100 cycles in service after the effective date. Remove from service CRF casings exceeding serviceable limits. Reinspect and remove casings per specified intervals until the first inspection after the AD effective date. Perform a visual, fluorescent-penetrant, and radiographic inspection at the next shop visit, but not later than 4,500 cycles in service after the effective date, and rework per SB 72-977.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next scheduled open cowl check, but not later than 100 cycles in service (CIS) after the effective date of this AD. For paragraph (e): at the next shop visit, but not later than 4,500 CIS after the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Company CF6-6 series turbofan engines installed on but not limited to McDonnell-Douglas DC-10 aircraft, models CF6-6D, CF6-6D1, CF6-6D1A, CF6-6K, CF6-6K2.
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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