What was found
INBOUND TO RIC THE LEFT HYDRAULIC SYSTEM QUANTITY WENT TO ZERO AND PRESSURE WENT TO ZERO. CREW CONTINUED TO DESTINATION AND PERFORMED MANUAL GEAR EXTENSION ON APPROACH. ALL COM PROCEDURES COMPLIED WITH AND THE LANDING WAS UNEVENTFUL. MAINTENANCE INSTALLED GEAR PINS AFTER LANDING AND THE AIRCRAFT WAS TOWED TO THE GATE. A TEMPORARY HYDRAULIC LINE WAS FOUND TO HAVE RUPTURED IN THE LEFT WING TRAILING EDGE AREA AND WAS REPLACED. NR 2 ENGINE DRIVEN HYDRAULIC PUMP AND FILTERS WERE ALSO REPLACED. AIRCRAFT HAS RETURNED TO SERVICE.