# SDR CALA2025091108767

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 9, 2025
- Submitted: September 11, 2025
- Operation: Air carrier
- Aircraft: [N75432](https://openairdocs.org/aircraft/N75432), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 32835
- Aircraft time: 52,110 hours, 18,616 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Inoperative
- 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/CALA2025091108767

## Discrepancy

EMERGENCY LIGHTS INOPERATIVE AT ROWS 8 THRU 14 IN MAIN CABIN.   SWAPPED 2503 BATTERY AND CHARGER, NO HELP. TRIED OTHER BATTERIES FROM OTHER LOCATIONS, NO HELP. 2503 DOES TEST.  HOWEVER ONLY T-LAV LOWER LIGHTS AND 2 CEILING LIGHTS FUNCTION. TESTED ALL BATTERY PACKS AND CHARGERS AT OTHER LOCATIONS, ALL FOUND TO BE NORMAL. REF AMM 33-51-00.   R & R EMERGENCY POWER SUPPLY M2503 PER AMM 33-51-06-960-806. OPS CHECK GOOD.

---
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.