As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENG 2 OVERHEAT/FIRE DET A LOOP FAULT. GROUNDED - YES. PERFORMED ENGINE/APU FIRE DETECTION CONTROL MODULE BITE PROCEDURE NO FAULTS FOUND REF B737-800 AMM 26-10 TASK 801. PERFORMED FIRE AND OVERHEAT DETECTION SYSTEM - OPERATIONAL TEST REF AMM 26-10-00-710-801 NO DEFECTS NOTED. NO 30 DAY HISTORY.