What was found
JFK - FLT 4830 - AFTER TAKEOFF WITH GEAR UP, NOTICED THE HYDRAULIC PUMP STILL RUNNING AND NO HYDRAULIC FLUID QUANTITY INDICATED. HYDRAULIC ACCUMULATOR PRESSURE WAS GOOD. RETURNED TO JFK WHERE AIRCRAFT HAD TO BE TOWED FROM TAXIWAY. FOUND A HOLE IN THE HYDRAULIC LINE FROM THE PUMP TO THE FILTER. REMOVED AND REPLACED THE HYDRAULIC LINE, SERVICED SYSTEM, PERFORMED LEAK AND OPERATIONAL CHECKS. RETURNED AIRCRAFT TO SERVICE. (M)