What was found
PHX/SFO - FLT 2604 - PRESSURE AND QUANTITY DROPPED TO ZERO SHORTLY AFTER LANDING AND DURING TAXI. NR 1 AND NR 2 ENGINE DRIVEN HYDRAULIC LOW PRESSURE LIGHTS ILLUMINATED THEN BOTH PUMPS WERE TURNED OFF WITHIN APPROXIMATELY 30 SECONDS. NR 2 ENGINE WAS SHUT DOWN. FOUND NR 8 GROUND SPOILER ACTUATOR HOUSING CRACKED. SENT TECHNICIANS AND PARTS FROM PHX. REMOVED AND REPLACED NR 8 GROUND SPOILER ACTUATOR PER AWA TASK CARD R3M27016. OPERATIONS AND LEAK CHECKS GOOD. PARTS TOTAL CYCLES, 36,944. (X)