# SDR AALA202308211781

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2023
- Submitted: August 21, 2023
- Operation: Air carrier
- Aircraft: [N467AL](https://openairdocs.org/aircraft/N467AL), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 11194
- Aircraft time: 2,150 hours, 594 cycles
- System (JASC): [2700 · Flight Control System](https://openairdocs.org/jasc/2700)
- Part: Trim Switch
- Part number: 27457
- Condition: Defective
- Location: Zone 200 - Fuse
- Stage of operation: AP
- How discovered: V
- Nature of condition: F, O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202308211781

## Discrepancy

AIRCRAFT WAS GROUNDED: ON APROACH INTO DFW AFTER AUTOPILOT DISENGAGEMENT AT 1,000 AGL, RUDDER TRIM WENT TO FULL LEFT TRIM, KNOB WOULD NOT WORK. FLIGHT CREW RESET ON GROUND TO ZERO, BUT DUIRNG TAXI IN THE RUDDER TRIM WENT TO FULL LEFT AGAIN. MAINTENANCE REPLACED RUDDER TRIM CONTROL SWITCH 9CC PER AMM 22-62-11. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.