What was found
ON CLIMBOUT AT 3000, LWR AFT BODY OVERHEAT LIGHT ILLUM. RAN CHECK LIST AND AFTER RETARD NR 2 THROTTLE LIGHT WENT OUT. ENG ANTI-ICE WAS OPENED JUST PRIOR TO ILLUM OF LWR AFT BODY OVERHEAT LIGHT. DECLARED EMERGENCY AND RETURN TO MEM. FOUND NR 2 ENG COWL THERMAL ANTI-ICE DUCT BLOWN. REMOVED AND REPLACED FIREWALL COUPLING, DUE VALVE INSTALLATION. DUCT REPLACEMENT AND SEALANT ON NR 2 ENGINE SIDE OF FIREWALL BRACE ROD IN AFT STAIRWELL REMOVED. REMOVED PANEL LEFT SIDE VERTICAL STABILIZER, PANEL ON TRUCK. REINSTALL THERMAL ANTI-ICE VALVE AND DUCT. SEALED FIREWALL SIDE OF COUPLING. RAN NR 2 ENG, NO LEAKS NOTED AND OPERATION NORMAL. REINSTALL PANEL ON STAB AND SUPPORT ROD, OK FOR SERVICE.