What was found
(CAN) CREW EXPERIENCED A FIRE INDICATION ON NR 2 ENGINE DURING DESCENT INTO YXE. NR 1 FIRE BOTTLE WAS DISCHARGED & ENGINE WAS SHUTDOWN. FIRE INDICATION RETURNED A SHORT TIME LATER. CREW DISCHARGED SECOND BOTTLE. EMERGENCY DECLARED & CREW REQUIRED EMERGENCY VEHICLES FOR A/C INSPECTION UPON LANDING. A/C LANDED WITHOUT INCIDENT. MAINT FOUND CHAFED WIRE ON NR 1 & 2 ENGINE FIRE DETECT LOWER ELEMENTS. REPLACED FIRE LOOP & GROUND TESTED SYSTEM AS SERVICEABLE. A/C RETURNED TO SERVICE WITH NO FURTHER INCIDENTS TO REPORT.