What was found
FLT 916 - NR 3 ENGINE FIRE INDICATION IN CRUISE SHUTDOWN PER EMER CHECK LIST AND BLEW BOTH BOTTLES. INDICATION PERSISTED OFF AND ON. LT BOTTLE SHOWED BLOWN AT SAME TIME AS FIRE. INSPECTED CONNECTORS AT FIREWALL AND INSIDE PYLON CHECKED WIRING ON ENGINE AND TO COCKPIT PER WDM 26-01-01. REPLACED CONNECTOR ON LT AND RT "A" LOOP FAN AND PYLON "A" LOOP CONNECTOR P/N`S 878239-02, 878238-02. REPLACED LT, RT FIRE LOOPS AND PYLON FIRE LOOPS PER MM 26-10-1. OPS CHECKS NORMAL SEE NEXT LOG PAGE FOR LT, RT ENGINE FIRE BOTTLES REPAIR. AIRCRAFT WAS GROUNDED. (A) 2 OF 3.