# SDR TRBA2009021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2009
- Submitted: February 11, 2009
- Operation: Air carrier
- Aircraft: [N451AT](https://openairdocs.org/aircraft/N451AT), 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: 451
- Aircraft time: 26,813 hours, 25,737 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 3012001AQS1000
- Condition: Failed
- Location: Emergency Light
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TRBA2009021

## Discrepancy

FORWARD "HALF" OF THE EMERGENCY LIGHTS ARE ILLUMINATED WHILE THE SWITCH IS IN THE ARM POSITION.  REMOVED AND INSTALLED ALL EMERGENCY LIGHT POWER SUPPLY BATTERIES IAW JIC NR 33-51-21-RAI-10010-004.

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