What happened
During a standard approach to runway 21, the aircraft encountered shifting wind conditions, causing it to balloon to an altitude of approximately 70 feet above ground level. In response to these conditions, the pilot began a go-around procedure. During this phase of flight, witnesses noted smoke emerging from the engine, followed by a radio transmission from the pilot indicating the aircraft was descending uncontrollably. The aircraft subsequently struck trees in a wooded area located roughly half a mile from the end of the runway.
Findings
Post-accident investigations identified several critical issues regarding the engine's performance. Analysis of the propeller showed an absence of power signatures, and the spark plugs exhibited sooting, which pointed to an over-rich fuel mixture. Investigators discovered that the turbo-controller had been set to a low position, limiting the maximum airflow to a level equivalent to high cruise power. According to the engine manufacturer, such a setting can lead to an excessively rich mixture, especially if the throttle or mixture controls are handled incorrectly. Additionally, it was determined that the pilot lacked the necessary training and experience required for operating turbocharged engines under the company's established training protocols.