What was found
(CAN) CREW REPORTED AILERON JAMMED IN FLIGHT, QRH CARRIED OUT SYSTEM CHECK SERVICEABLE ON THE GROUND BUT THE AIRCRAFT WAS FERRIED BACK TO MONTREAL FOR FURTHER INVESTIGATION. AN FMR TO REMOVE THE LEFT END AFT AILERON QUADRANT WAS ORDERED DUE TO THE FACT THAT A SUSPECTED CONTAMINATED BEARING OF THAT QUADRANT IS SUSPECTED TO FREEZE IN ALTITUDE. REPLACED QUADRANT ASSEMBLY. AILERON SYSTEM RIGGED AS PER AMM 27-11-00 AIRCRAFT FOUND SERVICEABLE.