# SDR AT0200008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 10, 2002
- Submitted: February 11, 2002
- Operation: Air carrier
- Aircraft: [N946AT](https://openairdocs.org/aircraft/N946AT), registered now
- Make and model: Boeing 717-200
- Registry model: [Boeing 717-200](https://openairdocs.org/model/boeing-717-200) (OpenAirDocs)
- Aircraft serial: 55009
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Actuator
- Part number: 2589445933
- Part serial: 1250124
- Condition: Malfunctioned
- Location: Yaw Dampener
- 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/AT0200008

## Discrepancy

UNCOMMANDED SMALL RUDDER MOVEMENTS IN CHOPPY AIR.  NOSE MADE SMALL YAW CHANGES, ACTED LIKE NO YAW DAMP ON.  NO PROBLEM NOTED WHILE IN SMOOTH AIR.  NEITHER AUTOPILOT ON.  PROBLEM STOPPED WHEN RUDDER HYDRAULIC CONT TURNED OFF.  REMOVED AND REPLACED YAW DAMPENER ACTUATOR.

---
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.