# SDR SWAA2025122954617

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 21, 2025
- Submitted: December 29, 2025
- Operation: Air carrier
- Aircraft: [N943WN](https://openairdocs.org/aircraft/N943WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36913
- Aircraft time: 51,234 hours, 31,377 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: No Test
- 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/SWAA2025122954617

## Discrepancy

G1 EXIT LIGHT INOPERATIVE.   PERFORMED EMERGENCY LIGHTS OPERATIONAL TEST IAW AMM 33-51-00-710-801 AND TEST FAILED.  UPON INVESTIGATION FOUND ALL EMERGENCY LIGHTS ASSOCIATED WITH BATTERY PACK M1674 DO NOT TURN ON PER WDM 33-51-12 AND 33-51-21. BATTERY PACK M1674 WILL BE REPLACED ON CCID: TTG8Q019HRVU.

---
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.