# SDR 4TXA2019120900234

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 9, 2019
- Submitted: December 9, 2019
- Operation: Air carrier
- Aircraft: [N959BP](https://openairdocs.org/aircraft/N959BP), registered now
- Make and model: Boeing 737-7BD
- Registry model: [Boeing 737-7BD](https://openairdocs.org/model/boeing-737-7bd) (OpenAirDocs)
- Aircraft serial: 36720
- Aircraft time: 12,245 hours, 9,156 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: D71701100
- Part serial: 462935
- Condition: Discharged
- Location: Emergency Lights
- Part time: 4,898 hours, 3,685 cycles
- 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/4TXA2019120900234

## Discrepancy

EMERGENCY BATTERY PACK FAILED DURING ROUTINE MAINTENANCE CHECK

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