What was found
PDIS 655 29-30 3219 23OCT20 CLE OPEN U LOGPAGES:3236545 ENROUTE TO CLE AT 350, GOT A ECAM WARNING FOR GREEN HYDRAULIC LO QUANTITY. THE GEEN HYDRAULIC GAUGE SHOWED FLUID BELOW RED DOT. ECAM GAUGE WAS AT THE BOTTOM OF THE SCALE. DIDN'T RECEIVE A LOW PRESSURE WARNING. COMPLIED WITH ECAM AND QRH WHICH HAD US TURN OFF GREEN HYD. PUMPS AND EMERGENCEY EXTEND THE GEAR. HAD MULTIPLE LOW LEVEL WARNINGS ON DISPATCH. SHGN 23OCT20 11:20 CLE U INITIAL EVALUATION AND WALK AROUND, NO HYDRAULIC LEAKS FOUND. INDICATION IN FLIGHT DECK WAS A LITTLE BELOW TOP HAT, SUSPECT INDICATION PROBLEM, REQIRES MORE TROUBLESHOOTING. R&R'D GREEN SYS TRANSMITTER & SERVICING VALVE.