# SDR DALA2020072312631

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2020
- Submitted: July 23, 2020
- Operation: Air carrier
- Aircraft: [N860DA](https://openairdocs.org/aircraft/N860DA), registered now
- Make and model: Boeing 777232
- Aircraft serial: 29951
- Aircraft time: 91,854 hours, 11,459 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Inoperative
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2020072312631

## Discrepancy

EMERGENCY LIGHTS AT L4 ARE INOPERATIVE. REPLACED BATTERY AND POWER SUPPLY. SYSTEM OPERATION IS NORMAL

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