What was found
(CAN) OPERATOR REPORTED AN HYDRAULIC SYSTEM TOTAL PRESSURE LOSS IN FLIGHT, "HYD LOW" MESSAGE WAS ON ON IIDS WITH MASTER CAUTION PBA`S FLASHING. A/C RETURNED TO BASE AND LANDED SAFELY WITH NO INJURIES OR DAMAGES, AFTER INVESTIGATION , A MAJOR HYDRAULIC LEAK WAS DISCOVERED IN THE NOSE LANDING GEAR BAY , HYDRAULIC LINE WAS FOUND DAMAGED AND PUCTURED. LINE IS USED FOR THE NLG UP SYSTEM. HYDRAULIC FLEXIBLE LINE WAS INSTALLED ON 7 MAY 2004 AND HAS 2501 CYCLES. TOTAL A/C CYCLES ARE 4573 , A/C TSN OF 5492.6 HRS. LINE WILL BE REPLACED.