As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS ENGINE HAD A COMPLETE FAILURE IN FLIGHT, PILOT WAS ABLE TO GLIDE TO AIRPORT. INITIAL INSPECTION FOUND DAMAGE TO CRANKSHAFT AND CAMSHAFT DRIVE GEARS INSIDE ACCESSORY GEARBOX. INSPECTION WAS NOT COMPLETE TO FIND OUT WHY THIS HAPPENED, DUE TO THE TIME AND AGE OF ENGINE. DECISION MADE TO JUST REPLACE ENGINE. LAST OVERHAULED APRIL 1968. (WO M8766)