What was found
AFTER TAKEOFF ON CLIMB-OUT FROM SPN, LOST ALL A-SYSTEM HYDRAULIC QUANTITY. FLIGHT CONTINUED TO GUM AND GEARS EXTENDED MANUALLY FOR LANDING. MAINTENANCE FOUND NR 5 L/E SLAT ACTUATOR LEAKING EXCESSIVELY. REMOVED AND REPLACED ACTUATOR ASSY. ALSO REPLACED BOTH A-SYSTEM HYDRAULIC PUMPS AND FILTER ASSEMBLIES. SLAT SYSTEM OPERATION CHECK GOOD. HYDRAULIC SYSTEM OPERATION CHECK AND LEAK CHECK GOOD. AIRCRAFT RETURNED BACK TO SERVICE. (X)