On June 28, 2013, at 1210 central daylight time, N455JM, an Ayres Corporation S2R-T34 single engine turbo propeller airplane impacted terrain during landing at Blackfish Airstrip, Heth, Arkansas. The pilot was not injured and the airplane sustained substantial damage. The airplane was registered to Humphrey B Flying, LLC; Terre Haute, Indiana, and was operated by Hutcherson Flying, Inc.; Forrest City, Arkansas. Day visual meteorological conditions (VMC) prevailed at the time of the accident and a flight plan had not been filed for the 14 Code of Federal Regulations Part 137 agricultural flight. The pilot stated that during landing his right main landing gear hit a pothole on the runway and directional control was lost when the right main landing gear partially collapsed. The pilot's efforts to correct the veer were unsuccessful and the airplane impacted terrain and came to rest upright in a ditch on the right side of the runway. The impact resulted in substantial damage to the right wing. A postaccident examination disclosed undetected corrosion in area of previous weld repairs to the right main landing gear.