As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE NR 2 OVERHEAT LIGHT ILLUMINATED. OVERHEAT DETECTION LOOP-A WAS INOPERATIVE THE PREVIOUS DAY ELIMINATING REDUNDANCY FEATURE OF THE OVERHEAT DETECTION SYSTEM. PERFORMED TROUBLESHOOTING OF OVERHEAT DETECTION SYSTEM. FOUND NR 2 ENGINE M1122 CORE LOOP-B FAILED INSULATION RESISTANCE CHECK. REMOVED AND REPLACE BOTH LOOP A & B CORE DETECTOR ELEMENTS M1122.