As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) "DURING CLIMB OF THE FLIGHT, THE CREW EXPERIENCED UNCOMMANDED NOSE DOWN PITCH TRIM. THE CREW PERFORMED THE QRH PROCEDURES AND RETURNED TO BASE AND LANDED WITHOUT FURTHER INCIDENT." "MAINTENANCE PERSONNEL REMOVED AND REPLACED THE FIRST OFFICERS YOKE PITCH TRIM SWITCH. AN OPERATIONAL CHECK WAS SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE."