As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) NR 1 HYDRAULIC FLUID QUANTITY WAS OBSERVED DECREASING IN CRUISE AND THE AIRCRAFT DIVERTED TO THE NEAREST MAINTENANCE BASE. THE PRESSURE/FILL ADAPTOR ON THE NR 1 HYDRAULIC MANIFOLD ASSEMBLY WAS FOUND LEAKING AND A DAMAGED O-RING WAS REPLACED.