What was found
DURING CRUISE, 'A' SYSTEM HYDRAULIC QUANTITY LOW. DURING FLAP EXTENSION QUANTITY DECREASED TO 2.0 GALLONS, UPON GEAR EXTENSION QUANTITY RETURNED TO NORMAL. CLOSED 'A' SYSTEM HYDRAULIC FLUID SHUTOFF VALVES AND CALLED OUT EMERGENCY EQUIPMENT AS A PRECAUTION. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE SERVICED 'A' HYDRAULIC SYSTEM AND INSPECTED FOR LEAKS. NO DISCREPANCIES NOTED.