# SDR CALA2025012101952

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2025
- Submitted: January 22, 2025
- Operation: Air carrier
- Aircraft: [N35953](https://openairdocs.org/aircraft/N35953), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 36404
- Aircraft time: 46,174 hours, 4,469 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 100260201
- Part serial: ST20033912
- Condition: Inoperative
- Location: Zone 200
- Part time: 20,445 hours, 2,109 cycles
- 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/CALA2025012101952

## Discrepancy

WIRELESS EMERGENCY LIGHTING SYSTEM CONTROL UNIT BATTERY - REMOVAL PREPARE FOR THE REMOVAL - POSITION L11X PER JOB CARD INSTRUCTIONS REPLACED WELLS BATTERY POSITION L11XIAW JOB CARD M&E# 79-3351-1-0008 INSTRUCTIONS AND AMM33-51-00. OPS CHECK NORMAL, NO FAULTS NOTED.

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