# SDR CALA2020071201043

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2020
- Submitted: July 12, 2020
- Operation: Air carrier
- Aircraft: [N27958](https://openairdocs.org/aircraft/N27958), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 36406
- Aircraft time: 23,182 hours, 2,128 cycles
- System (JASC): [2780 · Leading Edge Slat Control System](https://openairdocs.org/jasc/2780)
- Part: Sensor
- Part number: P683A000104
- Condition: Malfunctioned
- Location: Slat System
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2020071201043

## Discrepancy

CREW REPORTED, "SLATS DRIVE" MESSAGE DISPLAYED DURING CLIMB FOUND MSG 27-22321. FOLLOWED FIM . REPLACED SLAT SKEW DETECTION MECHANISM ASSY. ALL OPERATION NORMAL AND SLATS PRIMARY FCM L GND TEST PASS , NO MSG FOUND. ALSO SLAT BRAKAWAY CONNECTOR FUNCTION TEST NORMAL. FLAP AND SLATS OPERATION ALL NORMAL. REF FIM DMC-B787-A-27-80-F1-29A-421A-A, IAW DMC-B787-A-27-89-05-00B-340A-A. DMC-B787-A-27-89-03-00A-520A-A,AMM OBSERVED OUTBOARD LEADING EDGE SLAT SKEW DETECTION MECHSNISM INS TALLATION NO DEFECTS NOTED.

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