As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
605 HOURS TT ON ENGINES. EXCESSIVE WEAR BEWEEN ROCKER ARM AND FULCRUM. ONE FAILURE IN-FLIGHT. INSPECTION OF OTHER ENGINE REVEALED SAME RESULTS. REPLACED MOST OF THE ROCKER ARMS AND FULCRUMS ON AIRCRAFT. SUBMITTER RECOMMENDS INSPECTION EVERY ANNUAL OR 100 HOURS. SUSPECT CAUSE - LACK OF LUBRICATION (DESIGN FLAW).