As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
T/C 78472000 #1 ENGINE INSPECTION. WIRE IS BROKEN AT TERMINAL LUG OF CORE FIRE DETECTION HARNESS ON RIGHT SIDE. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE CORE FIRE DETECTION HARNESS LOOP A REF B737-900 AMM 26-11-02. ETOPS GROUND VERIFICATION SUCCESSFUL REF AMM 26-11-00-710-801.