As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YUL-FLIGHT 3974 CREW REPORTED NR 2 ENGINE HYDRAULIC PUMP CAUTION LIGHT ILLUMINATED ON TAKEOFF ROLL, PRESSURE DROPPED TO ZERO WITH FLUID LEAKING OUT OF NR 2 ENGINE NACELLE. MAINTENANCE FOUND OUTBOARD ACTUATOR LINE LEAKING. LINE REPLACED WITH AN INTERIM FLEX LINE IN ACCORDANCE WITH DEHAVILLAND DASH 8 MAINTENANCE MANUAL 20-50-52. NR 2 HYDRAULIC PUMP REPLACED. AIRCRAFT GROUND RAN, OPERATIONAL CHECK AND LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.