AD 91-10-03 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-45A | GENERAL ELECTRIC COMPANY Models CF6-45 and CF6-50 Series Engines |
| engine | General Electric Company | CF6-45A2 | GENERAL ELECTRIC COMPANY Models CF6-45 and CF6-50 Series Engines |
| engine | General Electric Company | CF6-50A | GENERAL ELECTRIC COMPANY Models CF6-45 and CF6-50 Series Engines |
| engine | General Electric Company | CF6-50C | GENERAL ELECTRIC COMPANY Models CF6-45 and CF6-50 Series Engines |
| engine | General Electric Company | CF6-50C1 | GENERAL ELECTRIC COMPANY Models CF6-45 and CF6-50 Series Engines |
| engine | General Electric Company | CF6-50C2 | GENERAL ELECTRIC COMPANY Models CF6-45 and CF6-50 Series Engines |
| engine | General Electric Company | CF6-50C2B | GENERAL ELECTRIC COMPANY Models CF6-45 and CF6-50 Series Engines |
| engine | General Electric Company | CF6-50C2D | GENERAL ELECTRIC COMPANY Models CF6-45 and CF6-50 Series Engines |
| engine | General Electric Company | CF6-50CA | GENERAL ELECTRIC COMPANY Models CF6-45 and CF6-50 Series Engines |
| engine | General Electric Company | CF6-50E | GENERAL ELECTRIC COMPANY Models CF6-45 and CF6-50 Series Engines |
Unsafe Condition
High Pressure Compressor (HPC) rear shaft fracture, which could result in an inflight engine shutdown and an uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Fluorescent penetrant inspect HPC rear shafts with specific part numbers per GE SB 72-958 Rev 1. Replace hook bolts with tapered turn-around bolts (P/N 1375M69P01 or VCD0016) after inspection. Remove cracked shafts before further flight. Reinspect shafts at intervals not exceeding 6,000 cycles since last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated in the AD, with specific schedules based on cycles since new (CSN), cycles in service (CIS), or cycles since last inspection (CSLI) as detailed in GE SB 72-958 Rev 1.
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Affected Aircraft
General Electric CF6-45 and CF6-50 series engines on McDonnell Douglas DC-10, Boeing 747, and Airbus A300 series aircraft, including all modified/ altered engines unless FAA approval is obtained for alternative compliance.
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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