# SDR 2020F00371

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 10, 2020
- Submitted: September 11, 2020
- Operation: General aviation
- Aircraft: [N950NN](https://openairdocs.org/aircraft/N950NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31194
- Aircraft time: 19,916 hours, 7,645 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: Discharged
- 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/2020F00371

## Discrepancy

EMERGENCY BATTERY PACK FAILED WHILE PERFORMING SCHEDULED MAINTENANCE.

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