As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) NO1 ENGINE DRIVEN HYDRAULIC PUMP FAILED - INVESTIGATION FOUND THAT ALL THE PISTONS HAD SEPARATED FROM THE PISTON SHOES - THE YOKE CONTROL SPRING BROKEN - PUMP CONTAMINATED WITH METAL - LOSS OF HYDRAULIC FLUID THROUGH DRIVE SHAFT SEAL