# SDR 2013FA0000148

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 25, 2013
- Submitted: March 5, 2013
- Operation: General aviation
- Aircraft: [N66174](https://openairdocs.org/aircraft/N66174), registered now
- Make and model: Cessna 172P
- Registry model: [Cessna 172P](https://openairdocs.org/model/cessna-172p) (OpenAirDocs)
- Aircraft serial: 17275975
- Aircraft time: 866 hours
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Thru Bolt
- Part number: ES4126
- Part serial: NOTSERIALIZED
- Condition: Backed Out
- Location: Alternator
- Part time: 44 hours, 44 cycles
- Component: Alternator, Kelly
- Component part number: DOFF10300B
- Stage of operation: CR
- How discovered: O
- Nature of condition: H, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2013FA0000148

## Discrepancy

PILOT EXPERIENCED A LOSS OF ELECTRICAL POWER IN FLIGHT.    R & R ALTERNATOR. NO OTHER DAMAGE TO ACFT WAS NOTED.  FURTHER EXAMINATION OF FAILED ALTERNATOR REVEALED ONE OF THE THROUGH BOLTS THAT SECURE HALVES OF THE ALTERNATOR HOUSING HAD BACKED OUT, RESULTING IN FAILURE.

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