What was found
JUST FINISHED UP POST MX AIRFRAME & ENG CHECKS & WERE TAXIING BACK ONTO THE FBO RAMP FROM THE RUNUP AREA WHEN THEY HEARD A HYD PUMP CAVITATE & NOTED PRESS LOSS ON THE LT SIDE. THEY THOUGHT THEY HAD AN AIR BUBBLE FROM ALL OF THE COMPONENTS THAT HAD BEEN REMOVED FOR THE INSPECTION & TRIED TO CYCLE DIFFERENT SYS TO MOVE FLUIDS. WHILE DOING THIS THE RT HYD PUMP STARTED TO LOSE & REGAIN PRESS SO THEY WERE ABLE TO TAXI TO THE HANGAR BEFORE THEY LOST ALL HYD PRESS. AFTER EXITING THE ACFT THEY FOUND FLUID RUNNING OUT OF THE LT NACELLE & SLEEVE OFF OF IT & AND FOUND THE LINE LINKED & RUPTURED. IT WOULD HAVE BEEN VERY DIFFICULT THE IDENTIFY THE KINK IN THE HYD LINE DURING NORMAL MX BECAUSE OF THE FIRE SLEEVE OVER THE LINE. THIS LINE ALSO APPEARED TO BE A FACTORY INSTALLED HOSE ASSEMBLY. THERE ARE SEVERAL OTHER SERVICE DIFFICULTY REPORTS VERY SIMILAR TO THIS REPORT.