# SDR NWAA071355521

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2007
- Submitted: April 18, 2007
- Operation: Air carrier
- Aircraft: N521US
- Make and model: Boeing 757251
- Aircraft serial: 23209
- Aircraft time: 65,727 hours, 27,663 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: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NWAA071355521

## Discrepancy

DURING LINE CHECK, FOUND EMERGENCY EXIT LIGHT AT AND AISLE LIGHTS AFT OF DOOR 2 LEFT INOPERATIVE.  REMOVED AND REPLACED BATTERY PACK (M733) IAW MM 33-51-07, OPS CHECK NORMAL.

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