AD 91-11-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-80A | GENERAL ELECTRIC COMPANY Models CF6-80A and CF6-80C2 Series Engines |
| engine | General Electric Company | CF6-80A1 | GENERAL ELECTRIC COMPANY Models CF6-80A and CF6-80C2 Series Engines |
| engine | General Electric Company | CF6-80A2 | GENERAL ELECTRIC COMPANY Models CF6-80A and CF6-80C2 Series Engines |
| engine | General Electric Company | CF6-80A3 | GENERAL ELECTRIC COMPANY Models CF6-80A and CF6-80C2 Series Engines |
| engine | General Electric Company | CF6-80C2A1 | GENERAL ELECTRIC COMPANY Models CF6-80A and CF6-80C2 Series Engines |
| engine | General Electric Company | CF6-80C2A2 | GENERAL ELECTRIC COMPANY Models CF6-80A and CF6-80C2 Series Engines |
| engine | General Electric Company | CF6-80C2A3 | GENERAL ELECTRIC COMPANY Models CF6-80A and CF6-80C2 Series Engines |
| engine | General Electric Company | CF6-80C2A5 | GENERAL ELECTRIC COMPANY Models CF6-80A and CF6-80C2 Series Engines |
| engine | General Electric Company | CF6-80C2A8 | GENERAL ELECTRIC COMPANY Models CF6-80A and CF6-80C2 Series Engines |
| engine | General Electric Company | CF6-80C2B1 | GENERAL ELECTRIC COMPANY Models CF6-80A and CF6-80C2 Series Engines |
Unsafe Condition
Failure of the high pressure compressor rotor (HPCR) stages 11-14 spool-shafts due to ultrasonic indications greater than or equal to 50 percent full-screen height could result in aborted takeoff and uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Ultrasonic inspect the inertia weld of HPCR stages 11-14 spool-shafts at the next engine shop visit after the AD's effective date, but no later than 5,000 cycles in service. Replace spool-shafts with indications ≥50% full-screen height before further flight. Use GE service bulletins 72-531 (CF6-80A) and 72-314 (CF6-80C2), revisions 2, for inspection instructions.
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Compliance Time
next engine shop visit after the effective date of this AD but no later than 5,000 cycles in service (CIS) after the effective date of this AD
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Affected Aircraft
General Electric Company CF6-80A and CF6-80C2 series engines installed on Airbus A300, A310, Boeing 747, and 767 aircraft
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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