What was found
(CAN) HYDRAULIC PRESSURE LOST DURING FLIGHT. LOSS OF PRESSURE DUE TO SHEARED INTERNAL SPLINES ON THE HYDRAULIC PUMP DRIVE COUPLING SLEEVE P/N S40.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) HYDRAULIC PRESSURE LOST DURING FLIGHT. LOSS OF PRESSURE DUE TO SHEARED INTERNAL SPLINES ON THE HYDRAULIC PUMP DRIVE COUPLING SLEEVE P/N S40.