As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOPILOT SYSTEM, WHEN AUTOPILOT SELECTED TO ALTITUDE PRESET, A/C DID NOT CAPTURE SELECTED ALTITUDE. FMS HEADING IN ONE DIRECTION AC DID NOT CAPTURE HEADING AS SELECTED. ON APPROACH TO RDG, PILOT WAS UNABLE TO SELECT APP NR ON AUTOPILOT CONTROLLER. REMOVED AND REPLACED A/P PITCH COMPUTER. AC TEST FLOWN SATISFACTORY AND RETURNED TO SERVICE.