# SDR CALA2025081407729

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2025
- Submitted: August 14, 2025
- Operation: Air carrier
- Aircraft: [N27957](https://openairdocs.org/aircraft/N27957), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 36409
- Aircraft time: 45,424 hours, 4,351 cycles
- System (JASC): [2700 · Flight Control System](https://openairdocs.org/jasc/2700)
- Part: Sensor
- Condition: Faulted
- Location: Zone 300
- Part time: 46,460 hours, 4,432 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: F
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025081407729

## Discrepancy

STABILIZER CONTROL CHANNEL (L2) HAS BEEN DEFERRED IN COMPLIANCE WITH MEL CARD 27105.  DEACTIVATED THE INOPERATIVE STAB CONTROL CHANNEL AS REQUIRED ON CARD 27105, IAW AMM DDG 27-41-03.  INSTALLED INOPERATIVE STICKER ADJACENT TO AFFECTED L2 STAB CUTOUT SWITCH ON FWD CONTROL STAND.  REPLACED HORIZONTAL STAB POSITION SENSOR 2 IAW AMM DMC-B787-A-27-48-01-00A-520A-A GROUND TEST PASSED.

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