Airworthiness Directives; Air Tractor, Inc. AT-300, AT-400, and AT-500 Series Airplanes

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This amendment adopts a new airworthiness directive (AD) that applies to certain Air Tractor, Inc. (Air Tractor) Models AT-300, AT- 400, and AT-500 series airplanes. This AD requires installing both a new flap actuator overtravel stop and a roll pin through the overtravel stop and jack screw. This AD results from incidents where the flap actuator overtravel stop nut disengaged from the jack screw. The flap pushrod pressed against the aileron pushrod, which caused difficulty in moving the ailerons. The actions specified by this AD are intended to prevent interference between the flap pushrod and the aileron pushrod caused by the flap actuator overtravel nut disengaging, which could result in loss of aileron control.