As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI CREW WAS PERFORMING PRETAKEOFF CHECKS AND RECEIVED HYD FLOW LOW L/R. CREW RETURNED TO RAMP. HYDRAULIC FLUID WAS FOUND LEAKING OUT OF LT WING IN THE SPEED BRAKE AREA. MAINTENANCE WAS DISPATCHED TO THE AIRCRAFT AND THE LT SPEED BRAKE ACTUATOR WAS FOUND WITH 4 BOLTS ATTACHING THE END HEAD SHEARED OFF.