What was found
(CAN) HYDRAULIC QUANTITY INDICATOR SHOWED RAPID DEPLETION TO 1 GAL AFTER TAKEOFF. FOUND RUPTURED HYDRAULIC LINE P/N BACH8B04NN0214T IN NOSE LANDING GEAR WHEEL WELL.LINE REPLACED IAW 20-10-52. ENGINE HYDRAULIC CASE DRAIN FILTERS CHECKED FOR METAL CONTAMINATION, NO CONTAMINATION FOUND. ENGINE RUN REQUIRED TO LEAK CHECK CASE DRAIN FILTERS AND CONFIRM PROPER HYDRAULIC PUMP OPERATION. HYDRAULIC PUMP OPERATION NORMAL ON BOTH ENGINE DRIVEN PUMPS.