What was found
NR 2 FIRE SWITCH DOES NOT LIGHT DURING FIRE TEST AND FAULT LIGHT ILLUMINATED. ACFT GROUNDED. CONFIRMED FAULT, NR 2 ENGINE FIRE B-LOOP INOPERATIVE AND FAILED TEST. ENGINE & APU FIRE DETECTION CONTROL MODULE SHOWS RIGHT CORE DETECTOR FAULT. OPENED RIGHT CORE & GVI RIGHT CORE DETECTOR, FOUND TERMINAL LUG BROKEN. TERMINATED THE LUG IAW SWP, & CLOSED RIGHT CORE. NR 2 ENGINE FIRE DETECTION SYSTEMS, A & B LOOPS GROUND FUNCTIONAL TESTED NORMAL IAW AMM 26-11-00-710-801. REPOSITIONED NR 2 ENGINE OVERHEAT SWITCH BACK TO NORMAL POSITION.