As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AUTO PILOT TRIPPED OFF LINE. RED TRIM ANNUNCIATOR ILLUMINATED ON MODE CONTROLLER. FLIGHT DIRECTOR WAS FUNCTIONING NORMAL. ALL ELECTRIC TRIMS FUNCTIONING NORMAL. AUTO PILOT WOULD NOT TEST, THEREFORE NOT ENGAGE. PITCH TRIM ADAPTER FOUND AT FAULT.