What was found
NR 2 ENGINE B FIRE LOOP WILL NOT TEST, A LOOP WORKS NORMAL. GROUNDED - YES. ACCOMPLISHED FIM 26-10 TASK 801 TO VERIFY FAULT, FOUND THAT FAULT NOW DISPLAYED IS FOR RIGHT CORE FIRE DETECTOR. ACCOMPLISHING VISUAL INSPECTION OF FIRE DETECTION HARNESSES, FOUND HARNESS MW0326 ON NR 2 ENGINE HAD BROKEN TERMINAL AT RIGHT CORE DETECTOR. REMOVED AND REPLACED HARNESS MW0326 REF AMM 26-11-02. OPS CHECK GOOD ON BOTH A AND B LOOP REF AMM 26-11-00-710-801.