# SDR MTNA0101701200001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2012
- Submitted: January 18, 2012
- Operation: Air carrier
- Aircraft: [N921FX](https://openairdocs.org/aircraft/N921FX), registered now
- Make and model: Aerosp ATR 42-300
- Registry model: [Aerosp ATR 42-300](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300) (OpenAirDocs)
- Aircraft serial: 319
- Aircraft time: 25,059 hours, 28,846 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Smoke
- Location: Cockpit
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MTNA0101701200001

## Discrepancy

DURING TAXI OUT, FLIGHT 7503,  ELECTRIC SMOKE WARNING ANNUNCIATED AND CREW OBSERVED LIGHT SMOKE IN COCKPIT.  INSPECTED 80&90VU RACKS, BEHIND INSTRUMENT PANELS, UNDER CENTER CONSOLE, THE PEDESTAL, PITOT, STATIC PROBES, RELAYS AND EQUIPMENT IN 121VU RACK AND GROUND HEAT UNIT.  A ENGINE RUN WAS PERFORMED WITH MULTIPLE SYSTEMS OPERATED FOR EXTENDED PERIOD OF TIME NO DISCREPANCIES FOUND.  THE AIRCRAFT WAS RETURNED TO SERVICE.

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