# SDR HYIA20130306001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 4, 2013
- Submitted: March 6, 2013
- Operation: Air carrier
- Aircraft: [N26156](https://openairdocs.org/aircraft/N26156), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0112
- Aircraft time: 18,027 hours
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Switch
- Part number: CM358950
- Condition: Failed
- Location: Master
- Part time: 198 hours
- 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/HYIA20130306001

## Discrepancy

DURING CRUISE FLIGHT,  CREW NOTICED A BURNING ODOR IN COCKPIT AND A SMALL AMOUNT OF HAZE OR SMOKE.  DIVERTED AND MADE AN UNSCHEDULED LANDING.  ON MX INSPECTION,   AVIONICS MASTER SWITCH WAS FOUND DEFECTIVE. SWITCH R & R IAW MM.

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