As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE OVHT/DET "A" LOOP "FAULT" LIGHT ILLUMINATES. GROUNDED - YES. DUE TO HISTORY AND PREVIOUS PART REPLACEMENTS, REMOVED AND REPLACED ALL 4 #1 ENGINE FIRE DETECTION ASSEMBLIES REF B737-800 AMM 26-11-01. OP CHECK GOOD REF AMM 26-11-00. ETOPS GROUND VERIFICATION SUCCESSFUL.