# SDR USAA2014032100017

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2014
- Submitted: March 21, 2014
- Operation: Air carrier
- Aircraft: [N723UW](https://openairdocs.org/aircraft/N723UW), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 1109
- Aircraft time: 40,546 hours, 23,250 cycles
- System (JASC): [2211 · Autopilot Computer](https://openairdocs.org/jasc/2211)
- Part: Computer
- Part number: B397BAM0513
- Part serial: Q00140006872
- Condition: Faulty
- Location: Autopilot Sys
- Part time: 35,737 hours, 20,175 cycles
- Stage of operation: DE
- How discovered: O
- Nature of condition: F
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2014032100017

## Discrepancy

DESCENDING THRU FL240 AT 320 KNOTS, CREW FELT A TAIL KICK, BUMP, MULTIPLE TIMES.  OBSERVED RUDDER ON FLIGHT CONTROL PAGE MOVING RT & LT.  DISCONNECTED AUTO PILOT & BUMP CONTINUED.  SLOWED ACFT TO 270 KNOTS & IT SUBSIDED BUT FELT IT & OBSERVED IT AGAIN MULTIPLE TIMES UNTIL LANDING.  R & R FAC 1 IAW AMM 22-66-34-400-002-A.  OPERATIONS CHECKED IAW AMM 22-96-00-710-001.  R & R NR 1 YAW DAMP SERVO ACTUATOR IAW AMM 27-26-51-400-001-A.  OPERATIONS CHECKED IAW AMM 22-63-00-710-001-A.

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