What was found
XNA - FLIGHT 2413, THE CREW REPORTED PITOT HEAT FAIL MESSAGE FOLLOWED BY SMOKE IN THE CABIN. MAINTENANCE INSPECTED THE AIRCRAFT, AND REMOVED AND REPLACED RELAY SOCKET TXK0054 WHICH WAS FOUND TO BE BURNT, AND RELAY K0054 AS A PRECAUTION, OPERATIONALLY CHECKED WITH NO DEFECTS. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.