What was found
(CAN) UPON TROUBLESHOOTING A HYD LIGHT SNAG, MAINTENANCE JACKED THE ACFT AND PREFORMED A GEAR SWING. GEAR WENT UP WITHOUT INCIDENT. UPON SELECTION OF GEAR DOWN A LOUD BANG WAS HEARD AND HYDRAULIC FLUID STARTED POURING FROM MULTIPLE PLACES ON LT SIDE OF FUSELAGE UNDER VARIOUS PANELS, WITH PANELS REMOVED, MAINTENANCE HAD FOUND A HYDRAULIC RETUN LINE, IPC REF DMC-12-A-29-10-00-020-941A-A ITEM NUMBER 10, HAD FAILED. LINE WAS R & R. UPON FURTHER INSPECTION OF THE FAILED LINE, IT WAS FOUND THAT TWO OTHER LOCATIONS ON THE LINE HAD BULDGED OUT AND LOOKED AS IF FAILURE IN THOSE LOCATIONS WAS INEVITABLE AS WELL. ALL OF THE FAILURES WERE WHERE THE HYDRAULIC LINE WAS IN CONTACT WITH THE RUBBER LINE SUPPORT BLOCKS, PN 944.87.33.141 IPC REF DMC-12-A-29-10-00-020-941A-A, ITEM NR 65 OF IPC DIAGRAM.