# SDR DALA1104406312

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 2011
- Submitted: January 21, 2011
- Operation: Air carrier
- Aircraft: N672US
- Make and model: Boeing 747451
- Aircraft serial: 30267
- Aircraft time: 49,747 hours, 6,228 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Inoperative
- Location: Emergency Light
- 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/DALA1104406312

## Discrepancy

DURING A LINE CHECK, MX FOUND THE RT 3RD & 4TH OVERWING EMERGENCY LIGHTS INOPERATIVE.  MX REPLACED THE POWER SUPPLY M7920 AND BATTERY.  OPS CHECK WAS   GOOD.

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