What was found
DURING TAKEOFF FROM PGUA, HYDRAULIC FLUID DROPPED TO STAND PIPE LEVEL. HYDRAULIC FLUID WAS LEAKING FROM NR 2 ENGINE. AIRCRAFT RETURNED TO PGUA AND LANDED WITH INCIDENT. AN INSPECTION IS ON GOING. INFORMATION WILL BE PROVIDED AS SOON AS IT IS AVAILABLE. MAINTENANCE FOUND HYDRAULIC FLUID DRIPPING FROM NR 2 ENGINE COWL. THE COWL WAS OPENED AND BOTH ENGINE AND COWL WERE CLEANED. DRY MOTORED NR 2 ENGINE AND FOUND HYDRAULIC LEAK AT NR 10 B-NUT BY THE HYDRAULIC FILTER. MAINTENANCE TIGHTENED B-NUT, DRY MOTORED ENGINE AND PERFORMED LEAK CHECK. ALL CHECKS ARE NORMAL PER ALL APPLICABLE MANUALS. NR 2 ENGINE COWL WAS CLOSED AND HYDRAULIC RESEVIOR WAS SERVICED. AIRCRAFT WAS RETURNED TO SERVICE.