# SDR TRBA2009120

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2009
- Submitted: December 9, 2009
- Operation: Air carrier
- Aircraft: [N540AM](https://openairdocs.org/aircraft/N540AM), registered now
- Make and model: Aerosp ATR 72-212A
- Registry model: [Aerosp ATR 72-212A](https://openairdocs.org/model/aerospatiale-atr-72-212a) (OpenAirDocs)
- Aircraft serial: 540
- Aircraft time: 19,815 hours, 22,462 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 3013017
- Part serial: 3843
- Condition: Failed
- Location: Emergency Lights
- Stage of operation: TX
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TRBA2009120

## Discrepancy

RT FWD EXTERNAL EMERGENCY LIGHT INOPERATIVE.  DID NOT WORK WITH BATTERY PWR BUT DID WORK WITH GPU.  REPLACED BATTERY PACK AT EMERGENCY PWR SUPPLY NR 43WL IAW ATR 72 MM 33-51-21.  OPS CHECK OK.

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