What happened
During a business flight, a light twin-engine airplane carrying a pilot and two passengers was approaching its destination airport. While on the final approach, air traffic controllers instructed the pilot to decrease speed to maintain separation from a slower aircraft on the base leg. The pilot acknowledged the instruction and confirmed he was reducing speed. Shortly after, the controller issued landing clearance, which the pilot acknowledged via radio.
Following this final communication, the aircraft disappeared from visual contact, though it remained visible on radar. The controller observed a plume of smoke along the final approach path. Witnesses on the ground reported seeing the aircraft flying at a low speed with visible wing wobbling before it turned right and descended into the ground. The impact was followed by a significant post-crash fire that destroyed most of the wreckage. There were 3 fatalities in the accident.
Findings
Post-accident investigations of the engines and flight control systems revealed no mechanical failures or pre-impact malfunctions. However, the investigation determined that the aircraft was operating at a low speed, which narrowed the margin between safe flight and an aerodynamic stall. The observed wing wobbling is a known indicator of an incipient stall.
Additionally, toxicological analysis of the pilot's blood revealed the presence of diphenhydramine, a sedating antihistamine, at a concentration consistent with a recent maximum over-the-counter dose. The presence of this sedating medication is significant because such substances can impair the cognitive and motor functions necessary for safe flight operations.