As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT LOST HYDRAULIC PRESSURE AT TOP OF DESCENT. CHECKED AIRCRAFT FOR EVIDENCE OF HYDRAULIC LEAKAGE AND NO LEAKS WERE NOTED. HYDRAULIC FLUID QUANTITY WAS NORMAL. CHECKED HYDRAULIC PRESSURE AND POWER SYSTEM. INSPECTED BOTH ENGINE DRIVEN HYDRAULIC PUMP CASE DRAIN FILTERS FOR CONTAMINATION AND NONE WAS NOTED. REPLACED BOTH FILTERS FOR PRECAUTIONARY MAINTENANCE.