# SDR 2022F00129

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2021
- Submitted: March 11, 2022
- Operation: General aviation
- Aircraft: [N499MC](https://openairdocs.org/aircraft/N499MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29260
- Engine: Ge CF680C2B1F
- Engine time: 70,802 hours, 15,377 cycles
- System (JASC): [7220 · Turbine Engine Air Inlet Section](https://openairdocs.org/jasc/7220)
- Part: Shaft
- Part number: 1277M75G07
- Part serial: GWNY0828
- Condition: Cracked
- Location: Fan Rotor
- Part time: 70,802 hours, 15,377 cycles
- Component: Fan Rotor, Ge
- Component part number: FANROTOR
- Stage of operation: IN
- How discovered: D
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022F00129

## Discrepancy

CF6-80C2B1F, FAN FWD SHAFT WITH 6 EA FPI INDICATIONS ON AREA FB NEAR THE VENT HOLES.  1 EA INDICATION CONFIRMED AS A CRACK.  PER THE GEK92451 TASK 72-21-05-230-001-051 A.(2) INDICATIONS IN AREA FA AND FB ARE NOT PERMITTED.  PART IS UNSALVAGEABLE.

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