# SDR CALA2026021313762

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 12, 2026
- Submitted: February 13, 2026
- Operation: Air carrier
- Aircraft: [N26910](https://openairdocs.org/aircraft/N26910), registered now
- Make and model: Boeing 787-8
- Registry model: [Boeing 787-8](https://openairdocs.org/model/boeing-787-8) (OpenAirDocs)
- Aircraft serial: 34826
- Aircraft time: 49,379 hours, 5,980 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 100260201
- Part serial: ST24060775
- Condition: No Test
- Location: Zone 200
- Part time: 4,332 hours, 523 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/CALA2026021313762

## Discrepancy

AHM ALERTED MMSG 33-11416, CLASS 16. L3 DOOR AFT G1 REMOTE WELS CONTROL UNIT BATTERY POWER FAILED.  THIS HAS ALERTED THE LAST 3 CONSECUTIVE FLIGHTS.  T/S IAW FIM B787-A-35-50-F1-T6A- 421A-A.  ON INITIAL EVALUATION, PERFORMED AN EMERGENCY LIGHTS OPS TEST, AMM B787-A-33-51-00-00C-320A-A. WCU 16 M3351090 BATTERY FAILED.  R & R WBU IAW AMM DMC-B787-A-33-51-07-02B. OPS CHKD GOOD.

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