As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1: AUTOPILOT TEST FAILED. CONSISTENTLY YAW TRIM BUT JUMPED FROM AP1 TO AP2 DURING SUBSEQUENT TESTS. A TEST FLIGHT EVAL FOUND T/R SEMA ACTUATOR GRINDING AND CHATTERING WHILE PERFORMING AFCS FUNCTION CHECK. REMOVED AND REPLACED T/R SEMA IAW AMM 67-20-00, 4-14; MOC SUCCESSFULLY COMPLETED.