What was found
DURING FLIGHT BETWEEN DFW AND SEA AT FLT LEVEL 310, CREW EXPERIENCED AN A-SYSTEM LOW HYDRAULIC PRESSURE LIGHT FLICKERING. CREW THEN NOTICED THE A-SYSTEM QUANTITY INDICATION WAS AT ZERO. DIVERTED TO SLC. WHEN LOWERING FLAPS WITH ALTERNATE SYSTEM, CREW COULD NOT DEPLOY THE NR 2 LEADING EDGE SLAT AND BOTH OUTBOARD TRAILING EDGE FLAPS. MANUALLY LOWERED GEAR AND LANDED A/C WITH 5 DEGREES OF FLAP. REPLACED NR 2 SLAT ACTUATOR PER MM FOR LEAKAGE.