As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) NR 2 ENGINE HYDRAULIC PUMP FAULTY. INVESTIGATION FOUND THAT THE PUMP CASE DRAIN CHECK VALVE HAD BEEN FITTED BACK TO FRONT AND THE HOSE FROM THE CASE DRAIN TO THE PYLON COLLAPSED. HYDRAULIC PUMP SEVERELY OVERHEATED. PERSONNEL/MAINTENANCE ERROR.