What happened
Prior to the accident, a witness observed the aircraft flying across an open field at a very low altitude. Subsequently, the aircraft collided with the tops of several pine trees at approximately 90 to 95 feet above ground level (AGL). Following this impact, the aircraft crashed to the ground.
The investigation
Examination of the wreckage revealed no evidence of pre-impact part failure or mechanical malfunction. The pilot had previously held a student pilot certificate and medical certificate, both of which had expired prior to the flight. Toxicology checks were conducted on the pilot's blood and urine at two separate laboratories.
Findings
One laboratory reported that the pilot's blood contained 1.6 mg/L of butalbital. The second laboratory reported a butalbital content of 3 mg/L, noting that this level would be in the therapeutic range. Additionally, salicylate was detected in the pilot's urine. Butalbital is a member of the barbiturate group of medications and typically has unwanted side effects of drowsiness and loss of alertness.
The pilot was under the influence of barbiturates.