As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FOUND ALUMINUM CONTAMINATION IN OIL SCREEN. FOUND NR 1+2 CYLINDER FORWARD SIDE PISTON PIN PLUGS WORN. FOUND THAT THE LOWER PISTON RING ON BOTH PISTONS CREATED A LIP AT THE BOTTOM OF THE CYLINDER BARREL ONLY ON THE FORWARD WALLS. THE PLUG WOULD THEN SLIDE ALONG THIS LIP AND SHAVE THE FACE OF IT.