# SDR UALA2009052101458

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 21, 2009
- Submitted: May 22, 2009
- Operation: Air carrier
- Aircraft: [N121UA](https://openairdocs.org/aircraft/N121UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29167
- Aircraft time: 42,120 hours, 5,025 cycles
- Engine: Pwa PW4056
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 582233
- Condition: Inoperative
- Location: Emergency Light
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2009052101458

## Discrepancy

EMERGENCY EXIT SIGNS INOP DOOR 4 LEFT AREA 3 SIGNS.  ONE ABOVE DOOR, ONE BELOW MONITOR, AND ONE UPPER WALL.  REPLACED BATTERY, CHECKS OKAY.

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