# SDR 2002FA0000567

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 1, 2002
- Submitted: May 1, 2002
- Operation: General aviation
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S8202
- Aircraft time: 1,184 hours
- System (JASC): [2497 · Electrical Power System Wiring](https://openairdocs.org/jasc/2497)
- Part: Wire
- Condition: Shorted
- Location: Voltage Reg
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2002FA0000567

## Discrepancy

ALTERNATOR FIELD C/B POPED IN FLIGHT. PILOT RESET C/B, SMELLED SMOKE IN THE COCKPIT, C/B POPED AGAIN. THE PILOT MADE A PRECAUTIONARY LANDING AT MNN.  AN INVESTIGATION OF THE PROBLEM DETERMINED THAT THE RED VOLTAGE REGULATOR WIRE HAD SHORTED ON THE GROUNDING POST OF THE RELAY BELOW CAUSING A SHORTED WIRE FROM THAT POINT TO THE 5 AMP C/B, ALTERNATOR FIELD.

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