20251126019099A

Aircraft approached kcos and was cleared for left base runway 17R touch and go. Upon touchdown the left wing lifted, pilot over corrected the control inputs which caused the right wing to come up, pilot felt aircraft was too unstable to land and decided to perform a go around. As the pilot was making corrections to bring the right wing down he added full power to go around, at slow speed along with over correction of the controls the aircraft veered off to the right of the runway and hit a 1000S feet remaining sign that impacted the left wing struts, left elevator/stabilator, which all sustained substantial damage, as the aircraft impacted the sign it became airborne. The damage to the aircraft made it very difficult to push the control wheel forward to bring the nose down. After gaining about 400 feet AGL the pilot communicated with ATC and received permission to come around and land on runway 35L. As the pilot landed the aircraft it veered to the right and hit a small runway light, aircraft came to a stop in the grass, the pilot taxied closer to the taxiway and shut the aircraft down.