What was found
(CAN) ON APPROACH AT 400 FT AND WHEN AUTOPILOT DISCONNECTED THE AIRCRAFT EXPERIENCED A SIGNIFICANT LEFT ROLL WHICH REQUIRED COMPENSATING SIDE STICK INPUT FOR THE FLARE. ON TAXI IN, MAINTENANCE NOTED THE L/H SPOILER 5 DEPLOYED AND OPERATIONAL CHECK OF SPOILERS ELOYED ALL BUT THE NR 5 RT. BOTH LT AND RT NR 5 SPOILERS HAVE PREVIOUSLY BEEN DEACTIVATED DUE TO A MEL DEFERRRAL ON THE LT UNIT. THE ADPM DEACTIVATION PROCEDURE WAS CONFIRMED CARRIED OUT SATISFACTORY, BY PHYSICAL INSPECTION ON BOTH NR 5 SPOILERS FOUND LT WOULD MOVE. MAINTENANCE REPLACED THE LT SPOILER SERVOCONTROL AND THE SYSTEM FUNCTION CHECKEDSATISFACTORY.