What was found
AFTER TAKEOFF, GEAR RETRACTED AND FLAPS RETRACTED GOT ECAM GREEN PRESSURE LOW, FOLLOWED BY GREEN FLUID QUANTITY LOW. FOLLOWED ECAM, MANUALLY EXTENDED GEAR. STOPPED ON THE RUNWAY AND TOWED TO THE GATE FOUND HYD FLUID POURING FROM #1 ENG, OPENED ENG AND FOUND GREEN HYD PUMP PRESSURE LINE "B" NUT FINGER LOOSE, TIGHT "B" NUT PER S.M.P, SERIVCED GREEN SYS HYD, STILL REQUIRES ENG RUN, FOR LEAK CHECK. SERVICED GREEN SYS HYDRAULICS TO MIDDLE OF TOP HAT, CHECKED FOR LEAKS AFTER ENGINE RUNS, NO LEAKS FOUND. DPI BUTTONS WERE NOT POPPED, CHECKED RESERVOIR FILTERS AND DELIVERY FILTERS FOR CLOGGING, NO DEFECTS NOTED. BOTH ENGINE HYDRAULIC PRESSURES WERE 2900-3000 PSI ALSO EXT OPS CK AND LANDING GEAR SWING. REF AIRBUS AMM 29-00-00-03, 29-11-32-04, 29-11-36-03, 29-11-15-03, 29-11-42-03, AND JRH.