# SDR 2007UALA03454

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 29, 2007
- Submitted: August 31, 2007
- Operation: Air carrier
- Aircraft: N177UA
- Make and model: Boeing 747422
- Aircraft serial: 24384
- Aircraft time: 71,727 hours, 8,974 cycles
- Engine: Pwa PW4056
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Fuse
- Condition: Failed
- 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/2007UALA03454

## Discrepancy

EMERGENCY LIGHTS INOP:  LEFT OVERWING 2 FWD ASSY'S.   REPLACED FUSE IN EMERGENCY POWER SUPPLY UNIT,  CHECKS OK.

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