# SDR DALA13072006308

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 25, 2013
- Submitted: December 26, 2013
- Operation: Air carrier
- Aircraft: N668US
- Make and model: Boeing 747451
- Aircraft serial: 24223
- Aircraft time: 100,274 hours, 12,397 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/DALA13072006308

## Discrepancy

LEFT OVERWING EMERGENCY, LIGHT 3RD AND 4TH FROM FWD INOPERATIVE.  REPLACED POWER SUPPLY & CKS OK IAW AMM 33-51.

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