What was found
#1 ENGINE BAD A LOOP FIRE TEST. GROUNDED - YES. PERFORMED ENGINE FIRE DETECTION OPERATIONAL TEST REF B737-800 AMM 76-11-00, OP CHECK GOOD. DUE TO RECENT FAULT HISTORY, PERFORMED TROUBLESHOOTING HIERARCHY PER B737-800 FIM 26-10 TASK 805. FOUND BROKEN WIRE AT TERMINAL LUG ON MW0325. REMOVED AND REPLACED MW0325 REF AMM 26-11-02. PERFORMED ENGINE FIRE DETECTION OPERATIONAL TEST REF AMM 76-11-00, OP CHECK GOOD. ETOPS GROUND VERIFICATION SUCCESSFUL.