As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA-YUL. FLIGHT 3978 CREW REPORTED THAT THE NR 1 HYDRAULIC ISOLATION VALVE AND INBOARD ROLL SPOILER LIGHTS HAD ILLUMINATED IN FLIGHT. AFTER FLAP UP LANDING IN YUL NORMAL BRAKING SYSTEM HAD FAILED. MAINTENANCE HAD INSPECTED THE AIRCRAFT FOR HYDRAULIC LEAKS AND NONE WERE FOUND. THE NR 1 HYDRAULIC SYSTEM WAS SERVICED. CREW RAN THE AIRCRAFT AND NO DEFECTS WERE NOTED. AIRCRAFT RETURNED TO SERVICE.