As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SHARP EDGES ON A NEW CYLINDER CAUSED DAMAGE TO A PISTON SEAL DURING ASSY AT FACTORY. OVER TIME THE SEAL STARTED TO SEPARATE AND THEN TO START BEING FORCED OUT OF THE PISTON WHICH CAUSED OIL TO START LEAKING ALL OVER THE PROPELLER ASSY.