As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT AN ANNUAL INSPECTION, THE GOVERNOR DRIVE COVER PLATE WAS REMOVED IN AN ATTEMPT TO STOP AN OIL LEAK. THIS EXPOSES THE FWD END OF THE CAM AND A CRACK WAS DISCOVERED EXTENDING FROM A SHARP CORNER IN THE KEYWAY. RECOMMEND A MODIFIED KEYWAY WITH A RADIUS IN THE CORNERS TO RELIEVE STRESS AREA. ALSO, RECOMMEND PERIODIC INSPECTION OF AREA.