Incident Overview
On a morning when the temperature measured -4 degrees Fahrenheit, the pilot operated an airplane that had been kept in an unheated hangar. The aircraft was equipped with an E-Z Heat airplane engine heater system. Approximately five minutes after departing, during the climb at an altitude of about 2200 feet, the pilot observed a high oil pressure indication. Additionally, oil was spraying onto the windshield and smoke began entering the cockpit.
Emergency Landing
The pilot reported, "Not knowing the extent of the damage and thinking I may have an engine fire I chose to make an off airport landing." During the subsequent emergency landing, the airplane struck a snow-covered rock and nosed over.
Post-Accident Examination
A post-accident examination conducted by the Federal Aviation Administration determined that oil had escaped through the nose seal. Furthermore, the crankcase breather line was found to be plugged with ice.
Advisory Circular Guidance
The FAA Advisory Circular 91-13C, dated July 7, 1979, stated that "...special care is recommended during the preflight to assure that the breather system is free of ice."