On July 3, 2013, about 1450 central daylight time, an Air Tractor, Inc. AT-502B, N5182C, impacted terrain when it overran the runway during takeoff from a Tillar Airport (5AR1) near Tillar, Arkansas. The airplane experienced a partial loss of engine power when there was a loss of cockpit throttle control. A throttle control pin was found on the cockpit floor. The airplane sustained substantial damage to the fuselage, empennage, and wings. The commercial pilot was uninjured. The airplane was registered to and operated by Confederate Air Inc under 14 Code of Federal Regulation Part 137 as an aerial application flight and was not operating on a flight plan. The local flight was originating at the time of the accident. According to a Federal Aviation Administration inspector from the Little Rock, Arkansas Flight Standards District Office, post-accident examination of the airplane revealed that a cockpit throttle control pin was lying on the cockpit floor. A cotter pin for the throttle control pin was missing, and the length of time it had been missing was not determined. The last maintenance inspection of the airplane was a 100-hour inspection dated April 18, 2013, at a Hobbs time of 57 hours. A National Transportation Safety Board Pilot/Operator Aircraft Accident/Incident Report was not received from the pilot.