What was found
IAH-2394, ON TAXI OUT OF BNA, THE CREW REPORTED A PACK TWO OVERHEAT ON TAXI OUT. THE SYSTEM WAS RESET SUCCESSFULLY, AND ON TAKEOFF HAD A STRONG ELECTRICAL ODOR LASTING APPROXIMATELY FIVE MINUTES. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND PLACED TEMPERATURE CONTROL ON MEL 21-60-04 "C" CONTROL NUMBER 108471, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.