AD 2012-01-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company | Airworthiness Directives; General Electric Company Turbofan Engines |
Unsafe Condition
Heavy wear found on the seating surface of the center vent duct (CVD) support ring and on the inside diameter of the fan drive shaft at the mating location, caused by relative motion between the CVD support assembly and the fan drive shaft during engine operation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the seating surface of the CVD support ring for wear. If wear is found, remove the CVD support assembly and fan drive shaft from service. If no wear is found on the CVD support ring, remove the CVD support assembly and borescope inspect the inside diameter of the fan drive shaft at the CVD support ring contact area for wear. If wear is found on the fan drive shaft, remove it from service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before accumulating 11,500 total cycles-in-service on the engine, unless already done.
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Affected Aircraft
General Electric Company (GE) CF34-10E series turbofan engines, serial number (S/N) 994116, and S/Ns 994118 through 994187, inclusive.
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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