# SDR UALA2009063001875

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 29, 2009
- Submitted: July 1, 2009
- Operation: Air carrier
- Aircraft: N177UA
- Make and model: Boeing 747422
- Aircraft serial: 24384
- Aircraft time: 79,425 hours, 9,786 cycles
- Engine: Pwa PW4056
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: Inoperative
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2009063001875

## Discrepancy

ALL LEFT EXTERIOR EMERGENCY LIGHTS INOP.  REPLACED POWER SUPPLY AND BATTERY, GROUND CHECKED OKAY.

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