What happened
On a non-scheduled domestic cargo positioning flight, the aircraft was performing an instrument landing system approach at Central Wisconsin Airport during moderate to heavy snowfall. The pilot reported that runway conditions were poor and covered in snow, with the presence of crosswinds and wind shear.
During the approach, the tower advised the pilot of a snow berm remaining on the west side of Runway 35 because the runway had not been plowed to its full width. After touchdown, the pilot attempted to steer away from the berm using right rudder while avoiding braking to prevent a skid. As the power levers were moved into the beta range, the left outer main landing gear tire made contact with the edge of the snow berm.
The aircraft then began to yaw to the left. Despite further right rudder application, the nose wheel struck the snow berm and broke off, causing the aircraft to travel over the berm. The main landing gear wheels collapsed completely, and the aircraft slid to a stop approximately 200 feet west of Runway 35. There were no injuries reported, but the aircraft sustained substantial damage.