# SDR TRBA2012051001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 2012
- Submitted: February 20, 2012
- Operation: Air carrier
- Aircraft: N355AT
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 355
- Aircraft time: 34,344 hours, 37,702 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 3012000
- Condition: Failed
- Location: Emergency Light
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TRBA2012051001

## Discrepancy

ON FLIGHT 9849, CREW REPORTED EMERGENCY LIGHTS STAYED ON WHILE ARMED AFTER BOTH ENGINES HAD STARTED.  THE ACFT WAS REMOVED FROM SERVICE.  R & R THE POWER SUPPLY IAW WORK CARD EX-335000-OPT-10000-001, EX-35-50000-CHK-10000-006, EX-335121-RAI-10010-006.  THE OPS CHECKED GOOD.  THE ACFT WAS RETURNED TO SERVICE.

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