# SDR NWAA 091665648

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2009
- Submitted: May 18, 2009
- Operation: Air carrier
- Aircraft: [N548US](https://openairdocs.org/aircraft/N548US), registered now
- Make and model: Boeing 757251
- Aircraft serial: 26495
- Aircraft time: 40,268 hours, 15,478 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: Inoperative
- Location: Emergency Lights
- 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/NWAA%20091665648

## Discrepancy

DURING AN OVERNIGHT LINE CHECK THE EMERGENCY LIGHTS AT DOOR TWO LEFT AND RIGHT WOULD NOT ILLUMINATE.  MAINTENANCE FOUND THE ASSOCIATED BATTERY PACK TO BE DEFECTIVE AND REPLACED IT.  SYSTEM OPERATION WAS NORMAL AFTER THE BATTERY PACK WAS REPLACED.

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