What was found
(CAN) DURING TAXI, LOW QTY INDICATION ON IIDS WAS NOTED BY THE FLIGHT CREW. GROUND CREW ALSO FOUND DROPS OF HYDRAULIC FLUID ON THE APRON IMMEDIATELY AFTER THE START OF TAXIING. THE ACFT WAS SHUTDOWN AT THE END OF THE APRON. APPROXIMATE LENGTH OF TIME OF OPERATION WAS BETWEEN 4 TO 5 MINUTES. GROUND CREW FOUND ONLY A SMALL AMOUNT OF HYDRAULIC FLUID IN THE RESERVOIR, BELOW LOW LEVEL INDICATION. APPROXIMATELY 7 TO 8 US QTS ADDED TO REPLENISH SYSTEM. CAUSE OF FAILURE WAS FOUND TO BE A RUPTURED NOSE WHEEL STEERING HYDRAULIC FLEX LINE, PN 150-409