# SDR SDR2004028

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 2004
- Submitted: May 28, 2004
- Operation: Air carrier
- Aircraft: [N447AM](https://openairdocs.org/aircraft/N447AM), registered now
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 447
- System (JASC): [3320 · Passenger Compartment Lighting](https://openairdocs.org/jasc/3320)
- Part: Circuit Board
- Part number: S0003014000000
- Condition: Shorted
- Location: Cabin
- Stage of operation: CR
- 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/SDR2004028

## Discrepancy

DISCREPANCY:  WHILE CRUISING AT 17,000 FT, THE CREW HEARD A RELAY CLICKING SOUND FOLLOWED BY CIRCUIT BREAKERS POPPING OUT FOR SEAT BELT, NO SMOKING, CALL SYSTEM AND RT CABIN READING LIGHTS.  FLIGHT ATTENDANT REPORTED ELECTRIC SPARKS AND SMOKE COMING FROM THE PASSENGER SERVICE UNIT (PSU) 8 C/D.  AIRCRAFT DIVERTED.

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