# SDR NWAA084325810

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2008
- Submitted: October 16, 2008
- Operation: Air carrier
- Aircraft: [N590NW](https://openairdocs.org/aircraft/N590NW), registered now
- Make and model: Boeing 757351
- Aircraft serial: 32990
- Aircraft time: 20,858 hours, 6,710 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/NWAA084325810

## Discrepancy

DURING AN OVERNIGHT LINE CHECK THE LT FORWARD EMERGENCY EXIT SIGN WAS INOPERATIVE.  MX ATTEMPTED TO REPLACE THE ASSOCIATED BATTERY PACK, BUT THE PROBLEM REMAINED.  REPLACEMENT OF THE POWER SUPPLY MODULE FOR THE AFFECTED BATTERY PACK CORRECTED THE PROBLEM.  ALL OPS CHECKED NORMAL AFTER REPLACEMENT OF THE POWER SUPPLY.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.