# SDR USAA2012121000012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2012
- Submitted: December 10, 2012
- 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: 38,144 hours, 21,455 cycles
- System (JASC): [2211 · Autopilot Computer](https://openairdocs.org/jasc/2211)
- Part: Computer
- Part number: B397BAM0513
- Part serial: Q00140007074
- Condition: Faulty
- Location: Autopilot Sys
- Part time: 28,676 hours, 19,068 cycles
- Stage of operation: CR
- 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/USAA2012121000012

## Discrepancy

IN FLIGHT AT FL330, AIRCRAFT YAWED LEFT FOR ABOUT 2 SECONDS, 5 DEGREE BANK THAN NORMAL RUDDER TRIM L 1.3.  MAINTENANCE REMOVED AND REPLACED FAC 1 PER AMM 22-66-34-000-002-A.  OPS CHECK GOOD.  ALSO, REMOVED AND REPLACED ELAC 1 PER AMM 27-93-34-000-001-A.  OPS CHECK GOOD.   TROUBLESHOT PER TSM 27-26-00-810-801-A.  PERFORMED SATISFACTORY AUTOLAND CHECK IAW J/C 26T00022001.  ACCOMPLISHED SATISFACTORY MAINTENANCE TEST FLIGHT.  NO DISCREPANCIES NOTED.  TEST FLIGHT HAD NO YAW ABNORMALITY.

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