# SDR UALA2009102603341

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 26, 2009
- Submitted: October 26, 2009
- Operation: Air carrier
- Aircraft: [N121UA](https://openairdocs.org/aircraft/N121UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29167
- Aircraft time: 43,803 hours, 5,215 cycles
- Engine: Pwa PW4056
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: BPS73
- Condition: Inoperative
- Location: Emergency Lights
- 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/UALA2009102603341

## Discrepancy

EMERGENCY LIGHTS INOP AT SEATS 1K THRU 4K, 6AB THRU 8AB, 62ABC THRU 60BC, & 54HJK THRU 60HJ.  REPLACED BATTERY PACKS FOR ALL LOCATIONS, OP CHECK OKAY.

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