Flight Details
The pilot reported that all systems were normal during startup and taxi. During the takeoff roll from runway 22, the aircraft accelerated as expected. However, upon rotation and lift-off, the engine experienced a partial loss of power. The pilot continued to fly the aircraft, but it was unable to climb or accelerate and remained on the edge of a stall. The aircraft traveled toward rising terrain and eventually collided with the ground approximately one mile from the airstrip. A post-crash fire consumed the wreckage.
Engine and Propeller Examination
The engine, a Subaru EJ2500 producing 210 horsepower, was severely heat distressed during the post-crash fire. Subsequent inspection and teardown were performed. The propeller hub was disassembled, revealing impact marks. The propeller appeared to be in a high-pitch setting at the time of impact. The composite propeller blades were broken off. The hub's electric motor was impact damaged and would not rotate; disassembly identified one brush as damaged.
Investigation Outcome
At the conclusion of the inspection, no conclusive evidence was found to determine the cause of the partial loss of engine power. The investigation was unable to identify a specific mechanical or operational factor that led to the power loss.