On June 20, 2010, at 1615 central daylight time, a Pilatus P3-05, N831AS, received substantial damage during an on-ground collision with a North American AT-6A, N8BP, at Myers Field Airport, Canby, Minnesota. The North American AT-6A struck the Pilatus P3-05, which was stopped with its engine running, near a fueling area. Visual meteorological conditions prevailed at the time of the accident. There were no injuries reported. Both airplanes were being operated under 14 CFR Part 91. The Pilatus P3-05 was holding for takeoff to return to Yankton, South Dakota, and the North American AT-6A was taxiing for takeoff and was to remain in the local area while giving air rides. The pilot of the Pilatus P3-05 stated that he flew into the airport to attend a fly-in breakfast and air show. Prior to his departure from the event, he obtained fuel and taxied to a "clear" area for about 1-2 minutes because of other aircraft coming into the fueling area. While holding in this area, a North American AT-6A taxied from behind the Pilatus and struck it. The North American AT-6A pilot stated the he was in the process of loading and unloading passengers for rides in the North American AT-6A with the engine running when the Pilatus stopped in front of North American AT-6A. The Pilatus P3-05 sustained substantial damage, which included two damaged ribs within the left wing. The North American AT-6A sustained minor damage to its right main landing gear door.