As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) TAXING FOR TAKEOFF AND WHILE PERFORMING FLIGHT CONTROL CHECKS, FLIGHT CREW NOTICED THAT THEY HAD LOST THE NR 1 HYD SYS. ACFT TAXIED BACK TO THE GATE WHERE A HYDRAULIC LEAK WAS NOTICED UNDER THE RT WING. A MAINTENANCE TEAM TRAVELED TO THE OUTSTATION AND FOUND THE RT INBD ROLL SPOILER ACTUATOR CASING FRACTURED. THE ACTUATOR WAS REPLACED, TESTED AND THE ACFT RELEASED FOR SERVICE.