# SDR DALA2016071205266

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 9, 2016
- Submitted: July 13, 2016
- Operation: Air carrier
- Aircraft: N670US
- Make and model: Boeing 747451
- Aircraft serial: 24225
- Aircraft time: 109,174 hours, 13,350 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Discharged
- Location: Cabin
- 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/DALA2016071205266

## Discrepancy

UPPER DECK AFT EXIT SIGN WOULD NOT ILLUMINATE.  MAINTENANCE REPLACED THE BATTERY AT M6378 POWER SUPPLY.  SYSTEM OPS IS NORMAL.

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