# SDR 0628022541

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 28, 2002
- Submitted: July 2, 2002
- Operation: General aviation
- Aircraft: N484SP
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S8030
- Aircraft time: 2,541 hours
- System (JASC): [3340 · Exterior Lighting](https://openairdocs.org/jasc/3340)
- Part: Circuit Breaker
- Part number: S13605L
- Condition: Failed
- Location: Nav Lights
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/0628022541

## Discrepancy

THE RIGHT WING NAV LIGHT POSITIVE AND NEGATIVE WIRES BURNED TOGETHER, SHORTING THE NAV CIRCUIT.  THE 5 AMP NAV LIGHT CIRCUIT BREAKER NEVER TRIPPED.  AN INVESTIGATION WAS INITIATED WHEN A PILOT REPORTED THAT THE NAV LIGHT SWITCH WOULD NOT STAY IN THE "ON" POSITION.

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