As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CESSNA SM AND LYC ENGINE OVERHAUL DO NOT CONTAIN THE REQUIREMENT TO USE A PROPELLER GOV PAD PLATE, PN LW-12347, WHEN INSTALLING A MCCAULEY GOVERNOR ON LYC 4 OR 6 CYLINDER ENGINE WITH REAR MOUNTED DUEL MAG INSTALLATIONS. THIS PLATE WAS LEFT OUT DURING REINSTALLATION OF THE ENGINE AND THE ACFT MADE A FORCED LANDING DUE TO LOSS OF ENGINE OIL THROUGH THE GOVERNOR ADAPTER PLATE SCREW.