As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT CREW REPORTS #2 ENGINE FIRE DETECTION DOES NOT TEST. GROUNDED - YES. PERFORMED ENGINE FIRE DETECTION RESISTANCE TEST PER B737-800 AMM 26-11-00-730-801. FAILED RIGHT CORE LOOP. DISCOVERED WIRES SEPARATED FROM TERMINAL LUGS. REPAIRED WIRES SEPARATED FROM TERMINAL LUGS PER 20-30-00 OF SWPM. PERFORMED ENGINE FIRE DETECTION OPERATIONAL TEST PER AMM TASK 26-11-00-710-801. TEST PASSED.