# SDR UALA2009050601296

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2009
- Submitted: May 8, 2009
- Operation: Air carrier
- Aircraft: N174UA
- Make and model: Boeing 747422
- Aircraft serial: 24381
- Aircraft time: 75,187 hours, 8,429 cycles
- Engine: Pwa PW4056
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 582233
- Condition: Discharged
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2009050601296

## Discrepancy

EMERGENCY EXIT SIGN ILLUMINATES FOR A FEW SECONDS THEN EXTINGUISHES UPPER DECK TOP OF STAIRS.  REPLACED BATTERY PACK.  OPS NORMAL.

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