What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO CLT . AT 2400' ECAM HYDRAULIC GREEN RESERVOIR LOW AND LANDING GEAR DOORS NOT CLOSED ECAM MESSAGES DISPLAYED DURING TAKE OFF. FLIGHT CREW FOLLOWED ECAM PROCEDURES AND TURNED OFF THE GREEN HYDRAULIC PUMP. THE AIRCRAFT LANDED SAFELY AT CLT AND WAS TOWED TO THE GATE. MAINTENANCE FOUND THE RIGHT HAND MAIN LANDING GEAR LOCK STAY ACTUATOR RETURN HOSE BROKEN OFF THE COUPLING AND REPLACED THE HOSE PER AMM 32-11-22. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.