What was found
PDIS 676 29-01 2402 19AUG23 MEM OPEN U GREEN HYD RSVR LO LEVEL ECAM MESSAGE IN CRUISE. COMPLIED WITH ECAM AND QRH PROCEDURES. DIVERTED TO MEM. GREEN HYD QUANTITY GAUGE SHOWED APPROXIMATELY 2 NEEDLE WIDTHS LOW FROM HAT. GAP GREW TO 4 NEEDLE WIDTHS DURING DESCENT. INSPECTED HYD SYSTEM FOR LEAKS WITH NO LEAKS NOTED AT THIS TIME. FOUND THE GREEN HYD RESERVOUIR TO BE OVER SERVICED BY TWO GALLONS. REMOVED AND REPLACED THE GREEN HYD RESERVOIR QTY TRANSMITTER REF AMM 29-31-11-04. OPS AND LEAK CHECK GOOD. PERFORMED HYD RESERVOIR SYSTEM LEAKAGE TEST REF AMM 29-14-00-05. CHANGED RESERVOIR PRESSURIZATION FILTER HOUSING ASSY DUE TO SUSPECTED LEAK. NO LEAKS FOUND IN SYSTEM. LET THE AIRCRAFT SIT FOR 4 HOURS BEFORE AND AFTER, READINGS HAVE NOT CHANGED FOR GREEN SYSTEM RESERVOIR(6.5 GALLONS FOR RESIGREEN SYSTEM AND HOLDING AT 52 PSI ON THE GREEN SYSTEM). RAN THE #1 AND #2 ENGINES FOR 30 MINUTES ALONG WITH RUNNUNG THE FLIGHT CONTROLS THRU WITH NO FAULTS NOTED AND THE GREEN SYSTEM HAS NOT FLUCUATED OR CHANGED.