What happened
A commercial certificated pilot was performing a landing on a rough and uneven gravel-covered airstorp. During the landing flare, the pilot encountered a slight downdraft, which caused the aircraft to touch down with more force than anticipated.
Following the touchdown, the left main landing gear collapsed, which was immediately followed by the collapse of the right main landing gear. The impact caused the fuselage to strike the surface of the gravel site.
The investigation
The aircraft sustained structural damage to the left elevator, the left wing, and the fuselage. Prior to the accident, the pilot reported that there were no mechanical anomalies noted with the airplane.