As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING CLIMB WHEN ENGAGING AUTOPILOT, RUDDER TRIM RESET TO 0.0 (ZERO) AND AIRCRAFT WAS IN AN AIRCRAFT WAS GROUNDED: SLIP WITH SEVERAL DEGREES OF BANK. DISENGAGED AUTOPILOT, MANUALLY TRIM THE RUDDER, AND RE-ENGAGED THE AUTOPILOT. RUDDER TRIM SEEMED TO FUNCTION WITH SOME BANK. REMOVED AND REPLACED RUDDER TRIM ACTUATOR.