On November 18, 2024, about 1530 eastern standard time, an experimental amateur-built Just Aircraft Highlander airplane, N102XP, was substantially damaged when it was involved in an accident near Fountain Inn, South Carolina. The airline transport pilot sustained minor injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that his preflight inspection and ground operation of the airplane were routine. During the initial climb after takeoff, the engine suddenly lost all power. Since there were no open areas ahead, he elected to perform a forced landing in the treetops. Once the airplane settled into the trees, it fell to the ground and came to rest about 1/4-mile past the departure end of the turf runway. He secured the airplane and was met by first responders. FAA inspectors responded to the accident site and examined the wreckage. The airplane came to rest upright against trees. There was no fire. Substantial damage was confirmed to the fuselage, empennage, and right wing. The wreckage was recovered to a salvage facility, where further examination was performed. The engine sustained minor damage. The spark plugs were normal in color and wear when compared to a manufacturer’s inspection chart. Internal engine continuity and compression were confirmed. There was fuel inside both carburetor bowls. No obstructions were found in the fuel system. The oil and cooling systems were intact. After repair to one intake manifold and reattaching the associated carburetor, the engine was prepared for a test run. After securing it on a forklift, the engine started on the first attempt. A run was performed using the electric fuel pump, and then again using only the engine-driven pump. No anomalies were found during the engine runs that would have precluded normal operation.