As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NON-ETOPS CARGO FLIGHT, DURING CLIMB, THE CREW NOTED THE NR 1 ENGINE OVERHEAT LIGHT ILLUMINATE. NR1 ENGINE EGT REMAINED WITHIN LIMITS. THE NR 1 THROTTLE WAS RETARDED TO IDLE AND THE OVERHEAT LIGHT EXTINGUISHED. ENGINE WAS KEPT AT IDLE AND THE CREW RETURNED TO DEPARTURE WITHOUT FURTHER INCIDENT. MX FOUND AN AIR LEAK IN THE ENG NOSE COWLING THERMAL ANTI-ICE DUCT. THE DUCT WAS REMOVED AND REPLACED AND OPERATIONALLY CHECKED IAW AMM 75-11-61. THE ACFT WAS RETURNED TO SERVICE.