As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON CLIMB-OUT, THE NUMBER 1 ENGINE DRIVEN HYDRAULIC PUMP FAILED AND AIRCRAFT RETURNED TO DEPARTURE AIRPORT. THE NUMBER 1 HYDRAULIC PUMP AND HYDRAULIC RETURN FILTER WERE REPLACED (SHAFT SHEARED ON PUMP) AND AIRCRAFT WAS RETURNED TO SERVICE. TIME SINCE LAST REPAIR 1380.1 HRS, 1388 CYCLES, SN MX-459161C.