What was found
CREW RECEIVED TAT 1 FAIL MESSAGE, HEARD A LOUD POP SOUND, AND THEN SMELLED AN ELECTRICAL BURNING ODOR. DECLARED AN EMERGENCY AND DIVERTED TO MLI. LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS FERRIED TO PIT WHERE MAINTENANCE REMOVED AND REPLACED THE TAT NR 1, TAT NR 1 C/P, AND ADSP NR 1.