What happened
A pilot rated passenger (PRP) was operating the aircraft from the rear seat during a final approach to land to the north at a grass strip. While on approach, the PRP observed an ultralight departing the grass strip from the south and turned the aircraft to the northeast.
During this maneuver, the commercial pilot in the front seat took control of the aircraft and pitched the nose up in an attempt to climb and reduce airspeed. The aircraft was transitioning from a downwind to a base leg when the nose suddenly pitched down sharply, resulting in an impact with the ground. The pilot reported that the engine ceased operation during the turn, prompting him to continue the turn toward an open area. There were no injuries reported.
The investigation
Investigators examined the wreckage and found that one propeller blade exhibited evidence of power. Deep gouges in the ground were also identified, which appeared to be propeller slashes caused by the impact. The investigation established continuity to all flight controls. The pilot rated passenger stated that no problems with aircraft or engine performance were observed prior to the event.