# SDR SWAA2024121677995

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 12, 2024
- Submitted: December 16, 2024
- Operation: Air carrier
- Aircraft: [N8541W](https://openairdocs.org/aircraft/N8541W), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 63599
- Aircraft time: 24,594 hours, 12,359 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: Inoperative
- Location: Zn 200 Fus Top
- 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/SWAA2024121677995

## Discrepancy

M1673 EMERGENCY LIGHT NOT POWERING LIGHTS AFTER DEEP CYCLE<[01] REMOVED AND REPLACED M1673 CHARGER ASSY AND BATTERY PACK REF AMM 33-51-06.

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