As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) DURING A PRE-FLIGHT INSPECTION, THE PILOT FOUND HYDRAULIC OIL ALONG THE LENGTH OF THE FUSELAGE FROM THE BRAKE OVERFLOW PORT. SYSTEM TROUBLESHOOTING FOUND THAT THE LHS ANTI-SKID VALVE WAS LEAKING, PUMPING HIGH PRESSURE HYDRAULIC OIL INTO THE LOW PRESSURE SYSTEM.