What was found
(CAN) DURING SCHEDULED MAINTENANCE AN OPERATIONAL CHECK OF THE ROLL SYSTEM DISCONNECT WAS PERFORMED IAW MFG MRB TASK 2760/02. IT WAS DISCOVERED THAT AILERON TRAVEL WAS RESTRICTED AT THE FULL LT WING DOWN SELECTION CAUSING THE ROLL SYSTEM DISCONNECT CLUTCH TO DISENGAGE AT FULL TRAVEL AND SUBSEQUENTLY ILLUMINATING THE ASSOCIATED CAUTION LIGHT. FURTHER INVESTIGATION DETERMINED THAT THE LT OUTBOARD ROLL SPOILER ACTUATOR HAD AN INTERNAL FAILURE CAUSING RESTRICTED TRAVEL DURING EXTENSION OF ROLL SPOILER.