# SDR TRB2004F00003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2003
- Submitted: February 25, 2004
- Operation: Air carrier
- Aircraft: N399AT
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 399
- System (JASC): [3397 · Light System Wiring](https://openairdocs.org/jasc/3397)
- Part: Connector
- Condition: Burned
- Location: Cabin Lights
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TRB2004F00003

## Discrepancy

DURING ENGINE START A ZAPPING NOISE WAS HEARD, LIGHTS FLASHED, RELAYS CLACKED FOLLOWED BY WHITE/BLUE SMOKE IN COCKPIT, ODOR OF BURNING INSULATION.  GPU DC CONNECTOR FOUND BURNED.  GPU DC CONNECTOR REPLACED.  OPERATIONAL CHECK OF ELECTRICAL SYSTEM CHECKED PROPERLY.

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