AD Amdt-39-9423
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company CF6 Series | Airworthiness Directives; General Electric Company CF6 Series Turbofan Engines |
Unsafe Condition
Cracks are likely to develop in High Pressure Compressor Rotor (HPCR) stage 3-9 spools due to metallurgical conditions, leading to spool separation and uncontained engine failure.
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Required Actions
Accelerate inspections for HPCR stage 3-9 spools per GE service bulletins, expand inspections to additional CF6-45/-50/-80A engines and CF6-80C2 series engines, and report inspection results meeting or exceeding reject criteria.
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Compliance Time
Before further flight for certain accelerated inspections; specific deadlines per inspection schedules in GE service bulletins.
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Affected Aircraft
GE CF6-45/-50/-80A/-80C2 engines with specified HPCR stage 3-9 spool part numbers installed on Airbus A300/A310, Boeing 747/767, and McDonnell Douglas DC-10/MD-11 aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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