What was found
(CAN) A/C DEPARTED YEG AT 10:56 LOCAL TIME. ON INITAL CLIMB, PILOTS REALIZED PITCH TRIM NOT RESPONDING CORRECTLY. ATC INFORMED, AND REQUESTED TO RETURN TO YEG MADE. AT TIMES, BOTH PILOTS WERE REQUIRED TO MANHANDLE ELEVATOR CONTROL. A/C LANDED UNEVENTFULLY AT 11.01 LOCAL TIME. PITCH TRIM SYS FUNCTIONALLY CHECKED SERVICEABLE BY MAINT PERSONNEL. PITCH TRIM ACTUATOR REMOVED & RETURNED FOR INSP & REPAIR AS REQUIRED. SERVICEABLE PITCH TRIM ACTUATOR INSTALLED AND A/C RETURNED TO SERVICE.