As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM WSAP, YAW DAMPER ENGAGED, RUDDER KICKED TO THE LEFT. DISENGAGED YAW DAMPER. CREW TRIED TO RE-ENGAGE YAW DAMPER AND RUDDER KICKED LEFT AGAIN, TURNED OFF YAW DAMPER. CREW RETURNED AIRCRAFT TO WSAP AND LANDED WITHOUT INCIDENT. AN INVESTIGATION IS ONGOING. AS SOON AS INFORMATION IS AVAILABLE IT WILL BE PROVIDED. MAINTENANCE THAT THE YAW CHANNEL COMPUTER HAD FAILED THE SELF TEST. THE YCC WAS REMOVED AND REPLACED PER ALL APPLICABLE MANUALS AND AIRCRAFT WAS RETURNED TO SERVICE.