What happened
During an instrument approach to Olathe, the pilot attempted a localizer approach despite forecasts indicating zero-zero visibility. The pilot reported that the last memory of the flight involved bracketing the localizer at an altitude of 1,600 feet. Following this, the aircraft struck two trees at an altitude of 12 feet above ground level while in a 30-degree right bank and positioned to the left of the localizer course.
The impact with the trees caused the aircraft type to undergo a flat 360-degree right rotation over small trees, which resulted in the separation of the left wing. After this maneuver, the aircraft struck the ground and slid for approximately 600 feet. A fire broke out originating from the right wing fuel tank, though it eventually extinguished itself. The pilot survived the crash with injuries.
Findings
Investigations into the accident revealed that the localizer was functioning within operational limits. Additionally, checks of the aircraft's static system and altimeters showed no mechanical defects. The investigation identified several contributing factors, most notably improper flight planning and decision-making by the pilot in command regarding the decision to proceed in fog and dark night conditions. Other findings included failure to follow IFR procedures, failure to maintain minimum descent altitude, and failure to execute a missed approach.