# SDR USAA20090602SB093

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 1, 2009
- Submitted: June 2, 2009
- Operation: Air carrier
- Aircraft: N449US
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24893
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 20131ASMI
- Condition: Shorted
- Location: Cabin
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA20090602SB093

## Discrepancy

DURING TAXI-OUT, CREW REPORTED THE EMERGENCY EXIT LIGHTS OVER SEAT ROWS 22DEF ILLUMINATED.  MAINTENANCE FOUND THE BATTERY PACK ASSEMBLY M1137 SHORTED.  REMOVED AND REPLACED BATTERY PACK ASSEMBLY PER MM 33-51-02.  OPERATIONAL CHECK NORMAL.

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