# SDR AALA202510275989

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 23, 2025
- Submitted: October 27, 2025
- Operation: Air carrier
- Aircraft: [N923US](https://openairdocs.org/aircraft/N923US), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6543
- Aircraft time: 33,759 hours, 13,729 cycles
- System (JASC): [2780 · Leading Edge Slat Control System](https://openairdocs.org/jasc/2780)
- Part: Actuator
- Part number: 830D000001
- Part serial: 0830D00LI204853
- Condition: Tripped
- Location: Zone 500 Slat
- Stage of operation: AP
- How discovered: O
- Nature of condition: F, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202510275989

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED INBOUND INTO SFO DUE TO THE FLIGHT CREW REPORTING A FLIGHT CONTROL SLATS FAULT ECAM ON APPROACH. THE AIRCRAFT LANDED SAFELY AT SFO AND TAXIED TO THE GATE UNDER ITS OWN POWER. MAINTENANCE FOUND THE LEFT WING #3 SLAT TORQUE MOTOR TRIPPED AND REPLACED SLAT ACTUATOR PER AMM 27-81-00. (AALA202510275989) AND MAINTENANCE ALSO FOUND THE LEFT-HAND ASYMMETRY POSITION PICK OFF UNIT (APPU) OUT OF ADJUSTEMENT, ACCOMPLISHED ADJUSTMENT PER AMM 27-81-00. (AALA202510272556) A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ISSUES NOTED.

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