Preflight and Takeoff
Before departure, the pilot conducted a magneto check that revealed an abnormal drop of 300-500 rpm on the right magneto. The pilot repeated the check several times both before and after takeoff, and on those occasions both magnetos were reported as normal.
Inflight Power Loss
After several minutes at cruise altitude, the pilot observed a decrease in engine rpm. A magneto check indicated that the right magneto was producing no spark—described as a "dead right magneto." The pilot decided to divert to the nearest airport with maintenance facilities.
Forced Landing
Shortly after changing course, all engine power was lost. The pilot attempted to restart the engine but was unsuccessful. During the resulting forced landing, the airplane contacted trees, with the first impact occurring 30-60 feet from the final touchdown point. After hitting the ground, the airplane skidded 25-50 feet before coming to rest on its nose.
Post-Accident Examination
Investigators attempted an engine test run but were unable to start the engine. The single-drive dual-magneto was removed and bench-tested, which revealed that neither set of points produced a spark. Disassembly of the magnetos showed that the neoprene cam followers on both sets of points had melted and smeared, thereby preventing the points from opening.