# SDR TRBA20121021001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 21, 2012
- Submitted: October 22, 2012
- Operation: Air carrier
- Aircraft: [N322AC](https://openairdocs.org/aircraft/N322AC), 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: 320
- Aircraft time: 34,019 hours, 38,877 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: AQS1000
- Part serial: 54817
- Condition: Unserviceable
- Location: Emergency Lights
- Component: Power Supply
- Component part number: 3012000
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TRBA20121021001

## Discrepancy

THE CREW REPORTED THE EMERGENCY EXIT LIGHTS REMAINED ON WITH THE SWITCH ON THE ARM POSITION (FIRST HALF REMAINED ON).  THE ACFT WAS REMOVED FROM SERVICE. R & R THE EMERGENCY LIGHT POWER SUPPLY AND BATTERY PACK 43WL.  PERFORMED OPS TEST IAW JIC 33-51-21-RAI-10000 AND JIC 33-51-21-RAI-10010 AND FOUND SYS OK.  THE ACFT WAS RETURNED TO SERVICE.

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