As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE OVERHEAT LIGHT CAME ON, STARTED QRH & THEN WENT OUT. PERFORMED FIM 26-10 TASK 811. NO DEFECTS FOUND AT THIS TIME. PERFORMED ENGINE FIRE DETECTION LOOP RESISTANCE CHECK. FOUND TO BE WITHIN LIMITS IAW AMM 26-11-00. REMOVED AND REPLACED UPPER FAN FIRE DETECTOR AS A PRECAUTION IAW AMM 26-11-01. OPS CHECKED GOOD. REF TTG8Q01E75GW FOR NR 1 ENG HIGH POWER RUN