What was found
(CAN) PILOT REPORTED THE UTILITY HYDRAULIC PRESSURE WAS FLUCTUATING AS WELL AS THE QUANTITY WAS DROPPING ON APPROACH. PUMPS WERE OFF LOADED AND FLUID QUANTITY STILL DROPPED. AIRCRAFT HAD COMPLETE LOSS OF UTILITY SYSTEM FLUID. AIRCRAFT LANDED AND TOWED TO HANGAR. NR 1 ENG HYDRAULIC PUMP HAD BLOWN SEAL AND SHEARED SHAFT, PUMP. REPLACED FLUID REPLENISHED. PART TC: 37,838.