As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DEPARTED YUL FOR KEF. WHILE IN CLIMB THE ENGINE NR 2 YELLOW HYDRAULIC PUMP FAULT LIGHT ILLUMINATED. THE PUMP WAS DE-ACTIVATED AND THE AIRCRAFT DIVERTED TO YHZ. MAINTENANCE TROUBLESHOOTING LOCATED A HYDRAULIC LEAK FROM THE HYDRAULIC PUMP NR 2 PRESSURE SWITCH. THE SWITCH ASSY WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.