The pilot was attempting to takeoff in the float-equipped Piper PA-18 from a trailer pulled down the runway at the airport in Cadillac, Michigan, by a truck.
He noted there was a direct crosswind from the right at 7 knots.
As the truck’s speed increased, the plane shifted on the trailer and the left float contacted a vertical post that blocked the float from contacting the tire.
As the airplane attempted to depart the trailer, the float chine caught on the trailer and turned the airplane toward the ground. The left wing struck the ground first, followed by the floats, propeller, and right wing.
The pilot sustained minor injuries in the crash.
Probable Cause: The pilot’s failure to maintain control of the float-equipped airplane after the float became caught on the trailer used for takeoff.
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This June 2020 accident report is provided by the National Transportation Safety Board. Published as an educational tool, it is intended to help pilots learn from the misfortunes of others.