As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING RETURN LEG THE LT RADIAL ENGINE OIL SYSTEM BEGAN INDICATING OVER TEMP READINGS. OTHER ENGINE INDICATIONS APPEARED NORMAL. ENGINE WAS SHUTDOWN AND SECURED FOR REMAINDER OF FLIGHT TO BASE. IFE WAS NOT DECLARED, LANDING WAS UNEVENTFUL.