What was found
DURING DESCENT INTO KCID, TAT 2 FAIL MESSAGE APPEARED, FOLLOWED BY AUTO THROTTLE DISCONNECT. AIRCRAFTS AUTO PILOT FROZE ON FPA VERTICAL MODE AND WOULD NOT CAPTURE PRESELECTED ALTITUDE. SWITCHED SOURCE SIDE TO CAPT AND REGAINED AUTOMATION. FIVE MINUTES LATER, SMELLED A FAINT ELECTRICAL BURNING SMELL. F/A REPORTED SAME SMELL IN CABIN. NO SIGN OF VISIBLE SMOKE OR FUMES (EXCEPT FOR FAINT SMELL). NO EMERGENCY DECLARED. MAINTENANCE REMOVED AND REPLACED THE TAT 2, ADSP 4, AND TAT 2 C/P.