The pilot reported that, during landing, on short final, he decided to go around. During the go-around, the airplane "developed a severe vibration" so he made a precautionary landing on runway 26 with the gear retracted. The airplane slid, exited the runway and impacted terrain.

The inspector further reported that the airplane sustained substantial damage to the external longerons on the lower fuselage and engine mounts.

The inspector added that, after his examination, he determined there were no mechanical malfunctions or failures to the airframe or engine that would have precluded normal operation.