As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AN INTERNAL O-RING FAILURE WAS THE CAUSE OF AN ACTUATOR LEAK AND SUBSTANTIAL AIRFRAME SYS HYDRAULIC FLUID LOSS DURING FLIGHT. UPON INVESTIGATION BY MAINTENANCE CREW IT WAS DISCOVERED THAT AN INTERNAL O-RING IN THE HYDRAULIC RETRACTION ACTUATOR HAD ROLLED OUT OF POSITION WITH FRICTION FROM THE INTERNAL PART OF ITS CHROME STRUT AND EVENTUALLY FAILED.