# SDR CA021120006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 10, 2002
- Submitted: December 2, 2002
- Operation: General aviation
- Make and model: Cessna 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (OpenAirDocs)
- Aircraft time: 8,582 hours
- Engine: Lyc O320H2AD
- Propeller: Mcauly 1C160DTM
- System (JASC): [3340 · Exterior Lighting](https://openairdocs.org/jasc/3340)
- Part: Switch
- Condition: Failed
- Location: Landing Light
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA021120006

## Discrepancy

(CAN) SMOKE IN THE CABIN WAS DETERMINED TO BE FROM THE LANDING LIGHT SWITCH. SWITCH WAS SHUT-OFF BUT CONTINUED TO SMOKE. ONLY WAY TO STOP SMOKING WAS TO TURN OFF THE BATTERY MASTER AS THE CIRCUIT BREAKER IS OF A TYPE THAT CANNOT BE MANUALLY PULLED. NEW SWITCH AND CIRCUIT BREAKER WAS INSTALLED AFTER AIRCRAFT WIRING AND LANDING LIGHT CHECKED SERVICABLE.

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