As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOPILOT ENGAGED THE TRIM CLACKER BEGAN TO RUN AND DID NOT STOP. WITH AUTOPILOT OFF, PRIMARY TRIM FAILED WITH NO CAS MESSAGE. CLACKER RUNS CONTINOUS IN FGC A OR B. REMOVED PRIMARY TRIM MOTOR ASSEMBLY AND INSTALLED A NEW MOTOR ASSEMBLY. OPERATIONAL CHECKED GOOD IAW MM 27-40-00.