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 WITH AUTOPILOT ENGAGED THE AUTO RUDDER TRIM DID NOT SEEM TO BE FUNCTIONING. INDICATOR SHOWED 0.0 AND THE AIRCRAFT WAS IN A SLIP AND 4 DEGREE BANK. DISENGAGED AUTOPILOT AND MANUALLY TRIMMED AND RE-ENGAGED AUTOPILOT. SEEMED TO FUNCTION CORRECTLY THEN WITH SIGNIFICANT LEFT TRIM. MAINTENANCE REPLACED #1 FLIGHT AUGMENTATION COMPUTER AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.