As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE DEVELOPED A VIBRATION. UPON REMOVAL AND TEARDOWN, IT WAS DISCOVERED THAT THE CAM JOURNALS WERE MISSING THE NECESSARY LUBRICATION CHANNELS. IT IS THE OPINION OF REPAIR STATION+ THAT THE HOLES WERE FILLED WITH A .1875" SOLID MATERIAL CONSISTENT WITH THE ADJACENT STRUCTURE AND WAS NOT SHAVING OR METAL PARTICLES FROM THE ENGINE.