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 AIRCRAFT EXPERIENCED A TOTAL LOSS OF HYDRAULIC SYSTEM A FLUID. AIRCRAFT TURNED BACK TO YUL AND LANDED WITHOUT INCIDENT. THE NR 3 SPOILER ACTUATOR WAS FOUND TO BE THE CAUSE OF THE FLUID LEAK.ACTUATOR REPLACED AND AIRCRAFT RETURNED TO SERVICE. A SHOP REPORT HAS BEEN REQUESTED FOR THE ACTUATOR UNIT. WILL ADD MORE INFO WHEN AVAILABLE.