As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YAW DAMPER: YAW DAMPER DOESN'T SEEM TO WORK IN TURBULENT AIR. PLANE FISH TAILS AND DUTCH ROLLS IN UNSTABLE AIR, BUT IS FINE IN SMOOTH AIR. THE YAW DAMP ENGAGE SWITCH ILLUMINATES GREEN, INDICATING NORMAL OPERATION .UPON FURTHER INVESTIGATION FOUND THE RUDDER AUTOPILOT SERVO CABLE ASSEMBLY BROKEN.