What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO AUA DUE TO THE FLIGHT CREW REPORTING THAT ON GEAR RETRACTION AFTER TAKEOFF, ECAM MESSAGES FOR GREEEN HYDRAULIC SYSTEM RESERVOIR LOW LEVEL, ENGINE 1 GREEN HYDRAULIC SYSTEM PUMP LOW PRESSURE, GREEN HYDRAULIC SYSTEM LOW PRESSURE AND LANDING GEAR DOORS NOT CLOSED DISPLAYED. THE FLIGHT CREW ACCOMPLISHED ECAM PROCEDURES AND PERFORMED A GRAVITY EXTENSION OF THE LANDING GEAR. THE AIRCRAFT LANDED SAFELY AT AUA AND TAXIED TO THE GATE UNDER ITS OWN POWER. MAINTENANCE FOUND THE LEFT-HAND MAIN LANDING GEAR LOCKSTAY ACTUATOR HOSE FITTING BROKEN AND LEAKING HYDRAULIC FLUID. MAINTENANCE REPLACED THE LOCKSTAY ACTUATOR HOSE PER AMM 32-11-22.