Accident Sequence
The pilot reported that after takeoff, during the initial climb, the engine sputtered and began losing power. Attempting to land on a highway, the pilot observed numerous vehicles in transit and decided to execute an off-airport landing instead.
During the landing, the aircraft's right wing tore a branch from a tree on initial impact. Subsequently, the right wing tip struck a grassy knoll. The main impact occurred when the aircraft hit a branch of a second tree, after which the aircraft came to rest inverted.
Weight and Balance
Post-accident calculations revealed the aircraft was 67 pounds over the maximum allowable gross weight at the time of takeoff. The center of gravity was within the allowable range.
Engine Examination
A teardown inspection of the engine found no preexisting condition, malfunction, or abnormal wear.
Witness Observations
Witnesses at the airport observed the pilot attempting to remove frost from the wings before takeoff. The pilot ran the engine at idle for almost 30 minutes prior to initiating takeoff. Additionally, the carburetor heat was found in the off position after the accident.