As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE FAILURE CAUSED BY TEETH BEING STRIPPED OFF OF CAMGEAR. ONE TOOTH APPEARS TO HAVE BEEN FRACTURED AND THE FOLLOWING 6 TEETH WERE STRIPPED. GEAR WAS STILL PROPERLY FASTENED TO CAMSHAFT. THE CRANKSHAFT GEAR WAS NOT DAMAGED. NO FOREIGN MATERIALS WERE FOUND IN CRANKCASE. ALSO, NO RECENT WORK PERFORMED IN THIS AREA. CAUSE OF FAILURE NOT DETERMINED. (X)