As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON 100-HOUR INSPECTION, FOUND PREMATURE WEAR ON THE DRIVE SHAFT OF HYDRAULIC PUMP ON INTERNAL SPLINES. WEAR WAS TO THE POINT OF THE SHAFT SHEARING. THE PROBLEM OCCURRED WITH ONLY 037 HOURS OF OPERATION ON THE PUMP. THE REPLACEMENT PUMP SHOWED THE SIMILAR PROBLEM.