# SDR NWAA083006746

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2008
- Submitted: August 1, 2008
- Operation: Air carrier
- Aircraft: N646NW
- Make and model: Boeing 747222B
- Aircraft serial: 23737
- Aircraft time: 72,108 hours, 9,355 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part serial: MX53159
- 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/NWAA083006746

## Discrepancy

DURING OVERNIGHT CHECK FOUND UPPER DECK COCKPIT EMERGENCY LIGHT WILL NOT TEST.  MAINTENANCE REMOVED AND REPLACED POWER SUPPLY.  OPERATIONAL CHECKED GOOD AND AIRCRAFT WAS RETURNED TO SERVICE.  (A)

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