What was found
(CAN) AFTER ENCOUNTERING A FLIGHT CONTROL ISSUE AFTER DEPARTURE, THE CREW ELECTED TO CARRY OUT A DIVERSION BACK TO AIRPORT. AN EMERGENCY WAS NOT DECLARED. MAINTENANCE CONTROL ADVISED. RESOLUTION ADIRU, IR2, REPLACED ON L 5296448. CARRIED OUT TASK 22-62-00-810-809A FOR FAC 1 NO FAULTS. REPLACED RUDDER TRIM ACTUATOR IAW AMM 27-26-51 PB 401. TESTED SERVICABLE. PN: 6137-3, TRIM RUDDER ACTUATOR.