What was found
JFK-MIA - FLT 743 - AFTER TAKEOFF, THE LOWER BODY OVERHEAT LIGHT ILLUMINATED AND A LOUD THUD HEARD BY FLIGHT ATTENDANTS. PULLED NR 2 ENGINE TO IDLE TO EXTINGUISH LIGHT. LIGHT CAME BACK ON WHEN THROTTLE ADVANCED. THE LT NR 2 ENGINE AT IDLE, DIVERTED AND LANDED JFK WITHOUT INCIDENT. REPLACED BLOWN SECTION OF THERMAL ANTI-ICE DUCTING, SHUT-OFF VALVE, ANTI-ICE VALVE AND THERMO SENSOR. ACCOMPLISHED ENGINE RUNUP, SYSTEM GROUND CHECKED NORMAL OPERATION. (W)