What was found
NR 3 ENGINE FIRE WARNING, PHASE ONES COMPLETED & ENGINE CHECKLIST, FIRED BOTTLE, LIGHT WENT OUT. OIL PRESSURE WAS POSITIVE. ACFT DIVERTED, ACFT WAS GROUNDED. INSPECTED ENGINE IAW MM 72-00-00. NO DEFECTS NOTED. INSPECTED ENGINE FOR EVIDENCE OF POSSIBLE FIRE IAW MM 72-00-00, . NO DEFECTS FOUND. R & R RT WING OTBD FIRE BOTTLE IAW MM AMMS 26-20-01. INSPECTION & TESTED A & B FIRE LOOPS NR 3 ENGINE ACCESSORIES BAY, CORE COMPT, & UNDERSIDE OF PYLON. ALL TEST WITHIN LIMITS IAW ACFT MM 26-10-0, CODE 50, ADJ/TEST. NR 3 ENGINE REQ'S RUN TO CK FOR POSSIBLE DUCT LEAKS. REPLACED EGT PIGTAIL HARNESSES TO J TECH HARNESSES. FOUND LEFT FIRE LOOP WITH LOW RESISTANCE, R & R LOOP IAW SWPM 20-62-16, OPS CHECKED SERVICEABLE IAW W/O 10588.