As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT LANDED, REDUCED THROTTLE TO GROUND IDLE, HEARD A LOUD GRINDING SQUEALING NOISE AND FELT VIBRATION IN COLLECTIVE STICK. SHUT ENGINE DOWN. CHECKED HYD FILTERS, FOUND NO METAL. PUMP WAS REPLACED DUE TO RESERVOIR RUNNING DRY CAUSING LOUD NOISE. REPLACED O-RING ON ELBOW DUE TO FINDING ELBOW LOOSE. REMOVED AND REPLACED HOSE ASSY DUE TO LEAK SPRAYING FROM HYD. HOSE. RETURNED AIRCRAFT TOSERVICE.