What was found
(CAN) AIRCRAFT FLAPS WERE LOWERED FOR PRE-FLIGHT WALK AROUND INSPECTION. DURING THE COCKPIT PRE-FLIGHT INSPECTION, THE FLAP MOTOR CIRCUIT BREAKER POPPED OUT. THE C/B WAS RESET AND APPEARED OK. THE STDB ENGINE WAS STARTED AND THEN THE PORT ENGINE. SMOKE WAS SMELLED IN THE COCKPIT AND THEN VISUALLY OBSERVED. THE AIRCRAFT WAS SHUT DOWN AND MAINTENANCE CALLED. MAINTENANCE CHECKS WERE COMPLETED AND THE MOTOR FOUND BURNT. FLAP MOTOR AND GEARBOX ASSY. REPLACED AND FLAP SYSTEM FUNCTION CHECKED SERVICEABLE.