What was found
DURING CLIMB-OUT, NR 4 HYDRAULIC SYSTEM LOW QUANTITY LIGHT CAME ON WITH A DROP OF SYSTEM QUANTITY OIL FROM 8.5 TO 2.5, SYSTEM WAS SHUTDOWN. QUANTITY REMAINED AT 2.5. TURNED ADP TO CONTINUOUS, QUANTITY STARTED DROPPING, SYSTEM SHUTDOWN. REF: LOG PAGE 537018, FUEL JETTISONED FROM 82.7 TO 47.1. REMOVED AND REPLACED NR 8 SPOILER ACTUATOR IAW MM 27-61-04. OPS AND LEAK CHECK OK. REMOVED SPOILER ACTUATOR, PN 33205001, SN 452423.