AD 2005-13-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company CT64-820-4 | Airworthiness Directives; General Electric Company CT64-820-4 Turboprop Engines |
Unsafe Condition
Low-cycle fatigue (LCF) cracks found in stage 1 turbine disk and shafts, part numbers 6004T47P03 and 4921T10P02, could result in an uncontained failure of the stage 1 turbine disk and shaft, resulting in damage to the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove stage 1 turbine disk and shaft from service at reduced compliance times, as specified in the AD, based on engine serial numbers and cycles-since-new (CSN).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within specified compliance times based on engine serial numbers and CSN, or by December 31, 2005, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Company CT64-820-4 turboprop engines with stage 1 turbine disk and shaft, part numbers 6004T47P03 or 4921T10P02 installed. These engines are installed on, but not limited to, DeHavilland DHC-5D Buffalo airplanes.
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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