# SDR DALA13072416304

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 26, 2013
- Submitted: December 27, 2013
- Operation: Air carrier
- Aircraft: N664US
- Make and model: Boeing 747451
- Aircraft serial: 23819
- Aircraft time: 102,102 hours, 12,830 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- 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/DALA13072416304

## Discrepancy

UPPER DECK LT EMERGENCY POWER RESERVOIR "BATTERY OK" LIGHT WON'T ILLUMINATE.  REPLACED BATTERY, CHECKED OK IAW AMM 52-23.

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