What was found
THE HYDRAULIC QUANTITY DROPPED TO TWO QUARTS ON FINAL APPROACH, WHEN THE LANDING GEAR WAS LOWERED. THE NOSE GEAR CAME DOWN AND LOCKED ABOUT 30 SECONDS AFTER GEAR EXTENSION WAS INITIATED. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE RT MLG RETRACT CYLINDER AT FAULT. THE RT MLG RETRACT CYLINDER WAS REPLACED. THE HYDRAULIC SYSTEM WAS SERVICED TO FULL. OPERATION OF ALL LANDING GEAR FUNCTIONED NORMALLY.