AD 86-12-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-45A | GENERAL ELECTRIC COMPANY Models CF6-50 and -45 Engines |
| engine | General Electric Company | CF6-45A2 | GENERAL ELECTRIC COMPANY Models CF6-50 and -45 Engines |
| engine | General Electric Company | CF6-50A | GENERAL ELECTRIC COMPANY Models CF6-50 and -45 Engines |
| engine | General Electric Company | CF6-50C | GENERAL ELECTRIC COMPANY Models CF6-50 and -45 Engines |
| engine | General Electric Company | CF6-50C1 | GENERAL ELECTRIC COMPANY Models CF6-50 and -45 Engines |
| engine | General Electric Company | CF6-50C2 | GENERAL ELECTRIC COMPANY Models CF6-50 and -45 Engines |
| engine | General Electric Company | CF6-50C2B | GENERAL ELECTRIC COMPANY Models CF6-50 and -45 Engines |
| engine | General Electric Company | CF6-50C2D | GENERAL ELECTRIC COMPANY Models CF6-50 and -45 Engines |
| engine | General Electric Company | CF6-50CA | GENERAL ELECTRIC COMPANY Models CF6-50 and -45 Engines |
| engine | General Electric Company | CF6-50E | GENERAL ELECTRIC COMPANY Models CF6-50 and -45 Engines |
Unsafe Condition
Failure of the high pressure turbine rotor (HPTR) stage 1 disk due to non-conformance with the FAA approved type design.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service specified HPTR stage 1 disks per GE Alert SB A72-859, Revision 1, for inspection. Disks non-conforming must be retired; conforming may return to service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to 5,500 flight cycles since new or within the next 10 flight cycles, depending on current flight cycles as of the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Company CF6-45A, CF6-45A2, CF6-50A, CF6-50C, CF6-50C1, CF6-50C2, CF6-50C2B, CF6-50C2D, CF6-50CA, and other CF6-50 and -45 engine models as listed.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.