AD 2012-03-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | General | Electric Company (GE) Turbofan | Airworthiness Directives; General Electric Company (GE) Turbofan Engines |
Unsafe Condition
Nonconforming No. 3 bearing packings with incorrect cooling holes could lead to unacceptable rotor bore cooling flow, potentially causing an uncontained failure of the high-pressure compressor (HPC) rotor or the low-pressure turbine (LPT) rotor, or both.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the No. 3 bearing packing for incorrect cooling hole size. If nonconforming, remove the packing and certain engine rotating life-limited parts (LLPs) if they were operated with unacceptable cooling flow for a specified number of cycles. A previous inspection in accordance with GE SB CF6-80C2 S/B 72-1405 may meet the one-time inspection requirement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 500 cycles in service (CIS) from the effective date, or at the next shop visit where the fan is separated from the HPC, if a successful optional borescope inspection (BSI) is performed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All GE CF6-80C2 model turbofan engines, including those marked as CF6-80C2B7F1 on the engine data plate.
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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