# SDR AALA202604272465

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 26, 2026
- Submitted: April 27, 2026
- Operation: Air carrier
- Aircraft: [N872AN](https://openairdocs.org/aircraft/N872AN), registered now
- Make and model: Boeing 787-8
- Registry model: [Boeing 787-8](https://openairdocs.org/model/boeing-787-8) (OpenAirDocs)
- Aircraft serial: 65992
- Aircraft time: 20,838 hours, 3,112 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 100260201
- Condition: Faulty
- 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/AALA202604272465

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: L1 DOOR POSITION EMER LIGHT TEST SW LIGHT GOES ON AND OFF. PERFORMED MAINTENANCE MESSAGE 33-11407 FAULT ISOLATION. MAINTENANCE REPLACED THE DOOR 4L WELS REMOTE CONTROL UNIT BATTERY IAW B787 FIM DMC-B787-A-33-50-F1-74A-421A-A AMM DMC-B787-A-33-51-07-02B-520A-A/720A-A.

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