On August 20, 2018, about 1640 Pacific daylight time, a Rans S14 airplane, N140JL, was substantially damaged when it was involved in an accident near Brownsville, Oregon. The sport pilot received serious injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot stated he had planned to overfly and photograph the location of a recent concert venue. As he arrived over the venue, he descended to about 600 ft above ground level (agl) and decelerated to about 60 miles per hour (mph) before entering a steep left turn. During the turn, he felt the airplane stall, and he attempted to recover as the airplane impacted the ground and struck a fence. The pilot reported there were no mechanical anomalies that would have precluded normal flight.