What was found
DURING DESCENT, RECEIVED HYD R RSVR LOW LVL MESSAGE. CREW SHUT OFF GREEN HYDRAULIC PUMP, PTU, GRAVITY EXTENDED LANDING GEAR, AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED LEAKING LEFT YAW DAMPER ACTUATOR. CHANGED HYD R RSVR LOW LVL TO HYD G RSVR LOW LVL AND CHANGED LANDED WITHOUT TO LANDED WITHOUT.