# SDR AALA202504080906

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 2, 2025
- Submitted: April 8, 2025
- Operation: Air carrier
- Aircraft: [N173US](https://openairdocs.org/aircraft/N173US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1481
- Aircraft time: 77,513 hours, 29,947 cycles
- System (JASC): [2700 · Flight Control System](https://openairdocs.org/jasc/2700)
- Part: Control Servo
- Part number: 31073110
- Part serial: 21789
- Condition: Malfunctioned
- Location: Zone 600
- Part time: 35,930 hours, 16,571 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202504080906

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: DURING POST MANTENANCE BASE VISIT FUNCTIONAL CHECK FLIGHT, THE FIGHT CREW REPORTED THAT WHEN SPEED BRAKE IS DEPLOYED AIRCRAFT ROLLS LEFT 2 TO 3 DEGREES. MAINTENANCE REPLACED RIGHT HAND AILERON SERVO CONTROLS 33CE2 (AALA202504086274) AND 33CE4 (AALA202504080906) PER AMM 27-14-51. ALSO REPLACED THE #1 ELEVATOR AND AILERON COMPUTER PER AMM 27-93-34. (AALA202504087746) A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.

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