# SDR CALA2025091909054

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 18, 2025
- Submitted: September 19, 2025
- Operation: Air carrier
- Aircraft: [N27511](https://openairdocs.org/aircraft/N27511), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 64493
- Aircraft time: 16,111 hours, 5,348 cycles
- 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/CALA2025091909054

## Discrepancy

EMERGENCY FLOOR MOUNTED PROXIMITY LIGHTS AT ROW 22-27 INOP.   REPLACED BATTERY BACK FROM POWER SUPPLY AT ROW 26ABC. REF AMM 33-51-06-960-802. OPS CHECK GOOD.

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