What was found
AFTER DEPARTING, THE FLIGHT CREW EXPERIENCED SMOKE IN THE CABIN. THE FLIGHT CREW TURNED BACK TO DEPARTURE. MAINTENANCE WAS CONTRACTED TO FIND THE PROBLEM AND DISCOVERED THE COPILOT AUX WINDSHIELD DEFOGGER OVERHEATED. MX INSPECTED THE WIRING, SWITCH, AND REMOVED THE DEFOGGER UNIT AND SECURED THE WIRING, THE AUX DEFOGGER WAS DEFERED AND THE AC RETURNED TO SERVICE. (K)