As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FLT 757, LOST OF BLUE HYDRAULIC SYSTEM FLUID IN FLIGHT. HYDRAULIC LEAK WAS FOUND COMING FROM NR 3 RT SPOILER VALVE GROUP AT THE FILTER HOUSING CAP PACKING. AFFECTED SPOILER VALVE GROUP WAS REPLACED AND A/C WAS RETURNED TO SERVICE.