Amateur-built 150 N997EM accident near Osceola, Wisconsin

Probable cause

The total loss of engine power for undermined reasons based on available information

NTSB analysis

The pilot completed one touch and go landing. During the climb the airplane’s engine lost total power. The pilot selected a field for a forced landing. During the forced landing the airplane impacted terrain and came to rest upright. The airplane sustained substantial damage when both wings separated from the fuselage during the forced landing.

The airplane was recovered, and the engine was examined. Impact damage to the carburetor prevented an engine test run. A visual inspection of the engine noted that a wire separated from the left magneto; however, it could not be determined if this was a result of the forced landing or if it had separated before the landing. The magneto was removed and tested by rotating the magneto with a drill; spark was observed on each terminal. The engine and fuel system examination did not reveal a reason for the loss of engine power.

Text from the NTSB. Open the NTSB docket for CEN21LA367 for the full record.