# SDR 96ZZZX1248

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N120PC](https://openairdocs.org/aircraft/N120PC), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0079
- System (JASC): [2460 · DC Power Distribution System](https://openairdocs.org/jasc/2460)
- Part: Switch
- Part number: CM358950
- Condition: Burned
- Location: Avion Master
- Stage of operation: CR
- Nature of condition: B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96ZZZX1248

## Discrepancy

DURING CRUISE FLIGHT, CABIN STARTED FILLING WITH SMOKE.  SMOKE WAS ORIGINATING FROM AVIONICS MASTER SWITCH - UNABLE TO TURN SWITCH OFF, SO CIRCUIT BREAKERS WERE PULLED.  SMOKE EVACUATION PROCEDURES WERE INITIATED AND SMOKE SUBSIDED.  A NORMAL LANDING WAS MADE.  PROBLEM CONFIRMED TO BE THE AVIONICS MASTER SWITCH.  SWITCH REPLACED WITH NEW.  AIRCRAFT RETURNED TO SERVICE.

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