As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER 25 MINUTE OF FLIGHT A HYDRAULIC SYSTEM FLUID LEVEL WENT TO ZERO, BOTH PUMP LOW PRESSURE LIGHTS CAME ON. AIR TURN BACK TO ELP. REMOVED AND REPLACED A SYSTEM PUMP FILTERS, NO CONTAMINATION FOUND. REPLACED A SYSTEM ACCUMALATOR IAW M/M 29-00, OPS CHECK NORMAL.