# SDR 2007FA0000689

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 1, 2007
- Submitted: August 3, 2007
- Operation: General aviation
- Aircraft: [N80213](https://openairdocs.org/aircraft/N80213), registered now
- Make and model: Cessna 172M
- Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (OpenAirDocs)
- Aircraft serial: 17266449
- Engine: Lyc O320*
- System (JASC): [2497 · Electrical Power System Wiring](https://openairdocs.org/jasc/2497)
- Part: Circuit Breaker
- Part number: S159660L
- Condition: Failed
- Location: Cockpit
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2007FA0000689

## Discrepancy

PILOT STATED SMOKE IN COCKPIT.  INSPECTION REVEALED ALTERNATOR OUTPUT C/B FAILED, ALTERNATOR HAD BROKEN AND LOOSE PARTS INTERNALLY, AND VOLTAGE REGULATOR FAILED.  OPENED C/B AND FOUND INTERNAL PARTS HAD MELTED CAUSING SMOKE.  NO SIGNS OF WIRE OVERHEATING, OR SECONDARY DAMAGE WAS FOUND.  (K)

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