AD 87-24-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Garrett Turbine Engine Company | Auxiliary Power Units | Airworthiness Directives; GARRETT TURBINE ENGINE COMPANY: Applies to Garrett Model GTCP 85 series Auxiliary Power Units Equipped with One-Piece Cast Turbine Wheels, Part Nos. 968095-X, 3604604-X, 3606982-1, and 3842072-1 |
Unsafe Condition
Turbine wheel separation and resulting containment shroud fragmentation
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install the augmentation containment ring, part number 3612249-1, in accordance with Garrett Service Bulletin GTCP 85-49-5689. Alternatively, install the Hastelloy S turbine shroud per Service Bulletin 85-49-700. Alternate means may be approved by the FAA.
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Compliance Time
Within 18 months after the effective date of this AD for in-flight operable units; within 36 months after the effective date for ground-operable-only units.
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Affected Aircraft
Garrett Model GTCP 85 series Auxiliary Power Units equipped with one-piece cast turbine wheels, Part Nos. 968095-X, 3604604-X, 3606982-1, and 3842072-1.
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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