# SDR CALA2025090908672

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 5, 2025
- Submitted: September 9, 2025
- Operation: Air carrier
- Aircraft: [N12005](https://openairdocs.org/aircraft/N12005), registered now
- Make and model: Boeing 787-10
- Registry model: [Boeing 787-10](https://openairdocs.org/model/boeing-787-10) (OpenAirDocs)
- Aircraft serial: 40937
- Aircraft time: 27,647 hours, 3,731 cycles
- System (JASC): [2782 · Leading Edge Slat Actuator](https://openairdocs.org/jasc/2782)
- Part: Actuator
- Part number: 4091620940
- Part serial: 35583067
- Condition: Faulted
- Location: Ee Bay
- Part time: 15,649 hours, 1,996 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025090908672

## Discrepancy

SLATS DRIVE CAUTION PRIMARY AND SECONDARY SLAT DRIVES HAVE FAILED TO OPERATE, OR HAV E BEEN SHUT DOWN BECAUSE OF AN ASYMMETRY, SKEW/LOSS, DISAGREE, OR UNCOMMANDED MOTION. DB 27 FCM OPS (RT) DB 27 FCM OPS (LT) DB 27 FCM OPS (CENT).  MESSAGE APPEARED AN HOUR INTO FLT. SLATS DID NOT DEPLOY FOR LANDING & ARE LOCKED. INTERREGATED CMCF & FOUND SLAT DRIVE FAULT WITH  MAINTENANCE MESSAGE  27-22463.  REPLACED C2 ACE FOUND MAINT MSG 27-22463. TS REF FIM 27-80-F1-39A-421A, REPLACED C2 ACE REF  27-02-17-00A-520A. ACCOMP ACE LRU REPLACEMENT TEST. NO FAULTS. OPS FLAPS & SLATS, NO ISSUES OK FOR SERVICE.

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