What was found
DURING CLIMB, A-HYD QTY WENT TO ZERO AND A PUMP LIGHT FLICKERED, RETURNED TO SHV. REPLACED CASE DRAIN FILTERS, NO METAL FOUND. FOUND THE NR 4 SLAT ACTUATOR SWIVEL LEAKING. REPLACED O-RING, REFILLED HYD SYS, RAN ENGINES AND B-PUMPS, OPERATED ALL FLT CONTROLS TO REMOVE AIR FROM HYD SYS AND SERVICED TO FULL, NO LEAKS NOTED.