What was found
INTERMITTENT FIRE WARNING ON NR 1 ENGINE. THRUST LEVER WAS RETARDED TO IDLE, ALL "FIRE DET FAULT" AND FIRE ALERTS WENT AWAY. OPERATED REMAINDER OF FLIGHT WITH NR 1 AT IDLE. CHECKED A/B FIRE LOOP. ALL ELEMENTS, OK. CHECKED ALL BLEED DUCTS, SECURITY CHECK OK. MOTORIZED NR 1 ENGINE, NO DUCT LEAKS. REF FIM 26-11 -00-1 FIG 103. A/B FIRE DETECTOR LT CORE COWL THIRD CLAMP FROM TOP, BOTH WIRE CHAFED THRU SHIELDING. INSULATED/ISOLATED BOTH WIRES. PERFORMED CFDS FDCU MENU. A/B TEST OK, FIRE TEST OK NR 1 ENGINE.