As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW REPORTED THAT THE PITCH TRIM ACTUATOR WAS FAULTY AS THE CAPTAINS PITCH TRIM COULD BE ACTIVATED USING ONLY ONE SWITCH SWITCH IS A SPLIT SWITCH THAT NORMALLY REQUIRES BOTH SWITCHES TO BE ACTIVATED TO OPERATE PITCH TRIM. SUBSEQUENT INVESTIGATION FOUND LEFT ACTUATOR CANNON CONNECTOR WITH SHORTED PIN TO CASE.