# SDR USAA2013060400023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2013
- Submitted: June 4, 2013
- Operation: Air carrier
- Aircraft: [N721UW](https://openairdocs.org/aircraft/N721UW), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 1095
- Aircraft time: 39,327 hours, 22,203 cycles
- System (JASC): [2211 · Autopilot Computer](https://openairdocs.org/jasc/2211)
- Part: Computer
- Part number: B397BAM0513
- Part serial: 6560
- Condition: Unserviceable
- Location: Autopilot Sys
- Part time: 39,661 hours, 19,138 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: F
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2013060400023

## Discrepancy

ENROUTE, CREW REPORTED AN UNCOMMANDED MOMENTARY RUDDER INPUT.  MX ACCOMPLISHED DFDR DOWNLOAD IAW JC 26T00031001, SHOWS NO ABNORMAL MOVEMENT OF THE RUDDER OR ACFT HEADING.  ACCOMPLISHED TSM 27-26-00-810-801A.  RESISTANCE AND INSULATION CHECK OF THE LVDT OF SERVO ACTUATOR, YAW DAMPER FAC1 AND FAC2 CHECKS OK.  R & R FAC1 COMPUTER IAW AMM 22-66-34-400-002-A.  ACCOMPLISHED SATISFACTORY OPS TEST OF THE AFS IAW AMM 22-96-00-710-001.  ACFT OK FOR SERVICE.

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