AD 91-15-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-45A | GENERAL ELECTRIC COMPANY Models CF6-45/-50 Series Engines |
| engine | General Electric Company | CF6-45A2 | GENERAL ELECTRIC COMPANY Models CF6-45/-50 Series Engines |
| engine | General Electric Company | CF6-50A | GENERAL ELECTRIC COMPANY Models CF6-45/-50 Series Engines |
| engine | General Electric Company | CF6-50C | GENERAL ELECTRIC COMPANY Models CF6-45/-50 Series Engines |
| engine | General Electric Company | CF6-50C1 | GENERAL ELECTRIC COMPANY Models CF6-45/-50 Series Engines |
| engine | General Electric Company | CF6-50C2 | GENERAL ELECTRIC COMPANY Models CF6-45/-50 Series Engines |
| engine | General Electric Company | CF6-50C2B | GENERAL ELECTRIC COMPANY Models CF6-45/-50 Series Engines |
| engine | General Electric Company | CF6-50C2D | GENERAL ELECTRIC COMPANY Models CF6-45/-50 Series Engines |
| engine | General Electric Company | CF6-50CA | GENERAL ELECTRIC COMPANY Models CF6-45/-50 Series Engines |
| engine | General Electric Company | CF6-50E | GENERAL ELECTRIC COMPANY Models CF6-45/-50 Series Engines |
Unsafe Condition
Cracks in high pressure turbine (HPT) thermal shields could lead to uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Eddy current inspect HPT thermal shields with specified part numbers before 800 cycles since last HPT overhaul or 400 cycles after AD effective date, whichever is later. Reinspect every 400 cycles. Remove cracked shields before flight and replace. Inspect HPT stage disks as per Appendix I if cracks are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to accumulating 800 cycles since last HPT overhaul or 400 cycles in service after the effective date of this AD, whichever occurs later. Thereafter, reinspect at intervals not to exceed 400 cycles since last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Company CF6-45/-50 series engines installed on Airbus A300, Boeing 747, and McDonnell Douglas DC-10-15/DC-10-30 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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