As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INVESTIGATION FOR DUAL HYDRAULIC PUMP FAILURE FOUND PUMPS RAN DRY DUE TO NO HYDRAULIC FLUID. SIGHT GAUGE USED FOR FLUID CHECK. IT IS BELIEVED FLUID CHECK WAS ERRONEOUS DUE TO STAIN ON GAUGE. GAVE INDICATION OF ADEQUATE FLUID WHEN ACTUALLY FLUID WAS DEPLETED. 150 FLIGHT HOURS SINCE RESERVOIR SERVICED.