What was found
DURIG CRUISE OBSERVED GREE HYDRAULICS ON OVERHEAD AT RED DOT, COMFIRMED BY ECAM. SHORTY THERE AFTER RECEIVED GRN LO LEVEL WARNIING. RAN QRH INCLUDING MANUAL GEAR EXTENETION CREW REQUESTED TOW TO GATE. ONCE PARKED, INSPECTED A/C FUSEAGE AND FLIGHT SURFACES AND FOUND NO FUILD STREAKS OR EVIDENCE OF LEAKS. PLACED ALL GEAR DOWN MANUAL RELEASE LEVERS TO SAFE POSITION. PER CREW DEBRIEF, ONCE GER WAS EXTENDED, GREEN SYSTEM WENT BACK TO TOP HAT. MX VERIFIED INDICATION. CREW REQUESTED TOW TO GATE. ONCE PARKED, INSPECTED A/C FUSELAGE AND FLIGHT SURFACES AND FOUND NO FUILD STREAKS OR EVIDENCE OF LEAKS. PLACED ALL GEAR DOWN MANUAL RELEASE LEVERS TO SAFE POSITION. RESET LANDING GEAR SYSTEM TO NORMAL PER M/M 32-33-00-02. FOUND GREEN HYDRO SYSTEM INDICATON TO BE BETWEEN YELLOW BAND AND TOP HAT AFTER GEAR DOOR CLOSURE. SERVICED GREEN HYDRO SYSTEM PER M/M 12-12-29-00, PER M/M 29-21-11-04, OPERATED GREEN HYSRO SYSTEM TO REMOVE ANY AIR. RAN BOTH ENGINE PER JRH AND CYCLED ALL FLIGHT CONTROLS SEVERAL TIMES TO VERIFY NO AIR IN SYSTEM. SHUT DOWN ENGINES AND FOUND GREEN HYRO SYSTEM TO BE AT TOP OF TOP HAT. A/C OK FOR SERVICE.