What was found
DURING CRUISE, ECAM WARNING FOR GREEN HYD LOW PRESSURE. PRESSURE INDICATED ZERO. GREEN HYD GAUGE ON OVERHEAD PANEL INDICATED LEVEL AT RED DOT. ECAM FLUID LEVEL INDICATED TOP OF RED BAND. CRANKED GEAR, NORMAL LANDING. AFTER ENGINE SHUTDOWN, GREEN LEVEL ON BOTH ECAM & OVERHEAD INDICATED NORMAL LEVELS. RELIEVED GREEN ACCUMULATOR OF CHARGE & NO FLUID CAME OUT, FLUID LEVEL STAYED THE SAME. REMOVED CASE DRAIN OVER PRESSURE LINE & BLEED RESEVOIR HEAD PRESSURE FROM RESEVOIR & NO FLUID DRAINED FROM LINE, & FLUID QTY ALMOST RETURNED TO LOWER PART OF HAT. FOUND PRESSURIZATION LINE RESTRICTOR FILTER VERY DIRTY & SEEMS RESTRICTED. R & R RESERVOIR PRESSURIZATION FILTER IAW MM 29-14-13-04 LEAK CHECKED NORMAL.