As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, THE RIGHT WING OVERHEAT LIGHT ILLUMINATED. FOLLOWED COCKPIT OPERATING MANUAL PROCEDURES AND LIGHT REMAINED ILLUMINATED. AIRCRAFT RETURNED TO NRT AND LANDED WITHOUT INCIDENT. REPLACED THE NR 3 ENGINE PYLON AFT OVERHEAT SWITCH TERMINAL AND REPAIRED TWO WIRES ON OVERHEAT LIGHT INDICATOR IN NR 4 ENGINE STRUT, OPERATIONAL CHECK GOOD.