What was found
NON ETOPS FLT 269 KOA-HNL. AT 20,000 FEET, NR 2 ENGINE OVERHEAT LIGHT CAME ON. CREW RETARDED NR 2 ENGINE THRUST LEVER AS PER QRH AND LIGHT EXTINGUISHED. THE CREW THEN DECLARED AN EMERGENCY AND LANDED WITH NR 2 ENGINE THRUST LEVER AT IDLE. AIRCRAFT TAXIED TO GATE WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND AN AIR LEAK AT A NR 2 ENGINE PRECOOLER CLAMP. MAINTENANCE REPLACED THE PRECOOLER DUCT CLAMP ASSY AND RAN ENGINE THREE TIMES AT PART POWER WITH NO OVERHEAT INDICATION. AIRCRAFT WAS RETURNED TO SERVICE.