As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE #2 'B' LOOP ENGINE OVERHEAT INDICATES A FAULT LIGHT AND UNSATISFACTORY TEST WHEN OVERHEAT SWITCH IN THE NORMAL POSITION. ENGINE FIRE TEST SATISFACTORY WHEN OVERHEAT SWITCH IS PLACED IN THE A LOOP POSITION. GROUNDED - YES. PERFORMED ENGINE/APU FIRE DETECTION CONTROL MODULE BITE. OPS CHECK GOOD. NO FAULTS AT THIS TIME. REF B737-800 FIM 26-10 TASK 801. NO HISTORY 90 DAYS.