As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
QRF VVI VLO 681. DURING CLIMB LH ENG OVERHEAT LIGHT COMES OB (ENG 1 OVERHEAT) AND FLIGHT DECK TEMPERATURE WAS EXESIVLY HOT FRM 261 011 51. CORRECTIVE ACTION: CORE FIRE DETECTION HARNESS HAS BEEN REPLACED. THEN ENG FIRE DET OPERATIONAL TEST OK