# SDR SWAA2025121952733

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 16, 2025
- Submitted: December 19, 2025
- Operation: Air carrier
- Aircraft: [N8811L](https://openairdocs.org/aircraft/N8811L), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 42661
- Aircraft time: 15,160 hours, 8,362 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: Failed
- Location: Zone 200
- 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/SWAA2025121952733

## Discrepancy

AFT EMERGENCY BATTERY PACK M01672 FAILED A CAPACITY CHECK.   R & R AFT EMERGENCY LIGHT BATTERY PACK M01672 IAW AMM 33-51-06.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.