As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOSS OF HYDRAULUIC FLUID THROUGH THE LEAKING PACKING IN THE RIGHT MAIN GEAR ACTUATOR RESULTED IN AN UNCOMMANDED LANDING GEAR EXTENSION DURING CRUISE. USE OF THE MANUAL EXTENSION PUMP WAS REQUIRED TO GET 3 GREEN GEAR DOWN LIGHTS PRIOR TO LANDING.