As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED AUTOPILOT PITCH TRIM FAILURE ANNUNCIATION CAME ON DURING CLIMB WITH AUTO PILOT DISCONNECTED. AIRCRAFT REPPORTED TO HAVE PITCH-UP MOVEMENT. FOUND NR 1 FCC-850 CARD INTERMITTENTLY NOT CROSS-TALKING TO NR 2 FCC-850 CARD. REPLACED NR 1 FCC 850 CARD WITH OVERHAULED UNIT. GROUND/FLIGHT CHECKS SATISFACTORY. (K)