# SDR 9512569940

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 1995
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N3322L
- Make and model: Doug DC-9-32
- Registry model: [Doug DC-9-32](https://openairdocs.org/model/mcdonnell-douglas-dc-9-32) (OpenAirDocs)
- Aircraft serial: 47031
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Yaw Damper
- Part number: 2589445933
- Condition: Malfunctioned
- Location: Auto Pilot
- Part time: 44,880 hours
- Stage of operation: CL
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9512569940

## Discrepancy

DURING CLIMB THROUGH 26,000 FEET WITH AUTO-PILOT ENGAGED, THE AIRCRAFT SUDDENTLY YAWED TO ONE SIDE THEN THE OTHER.  DISCONNECTED AUTO-PILOT AND PROBLEM CONTINUED.  SWITCHED RUDDER CONTROL MANUAL; YAWING CEASED.  CAPTAIN DECLARED AN EMERGENCY AND FLIGHT DIVERTED TO TYS.  NOTE:  NUMEROUS RUDDER TRIM CHANGES WERE REQUIRED DURING CONTINUATION OF FLIGHT TO MAINTAIN CENTERED POSITION.  AIRCRAFT LANDED WITHOUT INCIDENT.  REPLACED THE YAW DAMPER ACTUATOR.  OPERATIONAL CHECK OK.  AIRCRAFT RETURNED TO SERVICE.

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