# SDR CALA2026103020655

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 28, 2026
- Submitted: October 30, 2026
- Operation: Air carrier
- Aircraft: [N47414](https://openairdocs.org/aircraft/N47414), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 32827
- Aircraft time: 57,535 hours, 20,801 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: ADD71701100
- 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/CALA2026103020655

## Discrepancy

DURING SERVICE CHK,  FOUND L2 DOOR EMERGENCY SIGN TO NOT COME ON AS WELL AS AFT GALLEY OVERHEAD SIGN.   DURING TROUBLESHOOTING, SWAPPED BATTERY PACKS OF M1672 AND M1673 IN THE AFT GALLEY.  FAULT FOLLOWED CONFIRMING IT NEEDS THE BATTERY PACK REPLACED.  SWAPPED BATTERY PACKS TO ORIGINAL CONDITION IAW AMM 33-51-06-960-805. R & R THE BATTERY PACK M1673 IAW AMM 33-51-06-960-805. OPS CHECK GOOD, NO DEFECTS NOTED.

---
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.