Accident Description
The pilot reported that during a fly-by at a restricted landing area, the engine did not respond when he applied power. He attempted a 180-degree turn to land on the runway in the opposite direction. However, before the turn was completed, the right wing tip struck the ground.
Post-Accident Examination
Examination of the airplane after the accident revealed that a clamp attached to the engine mount, which secured the throttle cable to the engine mount structure, had rotated. This rotation prevented the opening of the carburetor butterfly when the throttle was advanced, causing the lack of engine response.
Regulatory Findings
Additional information obtained during the investigation showed that the pilot's most recent application for a medical certificate was denied on November 14, 2003. According to Federal Aviation Administration regulations, a person operating an airplane as a light sport aircraft must have been found eligible for at least a third-class airman medical certificate at the time of their most recent application if they have previously applied for a medical certificate.
Furthermore, the accident airplane, an Ercoupe 415D, has a maximum gross weight of 1,400 pounds. This does not comply with the 1,320-pound maximum gross weight limitation prescribed in the regulations for light sport aircraft.