What was found
CREW REPORTED THAT DURING FLIGHT RECEIVED A "TAT 2 HEAT INOP" MESSAGE. SHORTLY AFTER RECEIVING THE MESSAGE THE CREW REPORTED THAT THE COCKPIT AND PART OF THE CABIN FILLED WITH SMOKE AND THAT THE SMOKE SMELLED ELECTRICAL. THE CREW DIVERTED AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE TOTAL AIRCRAFT TEMPERATURE NUMBER RELAY (K0494) AND ITS SOCKET TO BE BURNT. MAINTENANCE PULLED AND COLLARED THE TOTAL AIRCRAFT TEMPERATURE NUMBER 2 SENSOR CIRCUIT BREAKER AND DEFERRED THE SYSTEM. THE DEFERRAL WAS CLEARED ON 3/14/2012 BY REPLACING THE RELAY AND ITS SOCKET. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.