As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER 4 HOURS OF FLIGHT, STARTED DESCENT, NR 1 HYDRAULIC PRESSURE LOW LIGHT ON. EMERGENCY CHECK LIST CARRIED OUT, THEN THE NR 2 HYDRAULIC LOW PRESSURE LIGHT ON. A HYDRAULIC PRESSURE WENT TO 35 PSI. NO NOTICEABLE HYD FLUID LOSS. EMERGENCY DECLARED. AIRCRAFT LANDED AND STOPPED ON RUNWAY. REPLACED NR 2 ENGINE CASE RETURN FILTER, HYD RESEVOIR AIR PRESS REGULATOR.