Incident Overview
A flight instructor and a student pilot were conducting touch-and-go landings in the airport traffic pattern. After completing one circuit around the pattern, they transitioned from landing to a second takeoff. During this transition, the airplane rolled nearly the entire length of the runway before becoming airborne.
Loss of Control and Impact
Shortly after liftoff, the airplane banked steeply to the left at a low altitude. It then descended in a nose-down attitude and subsequently impacted trees and terrain. Examination of the wreckage revealed no evidence of any pre-impact failures or malfunctions.
Toxicology Results
Toxicological testing of the flight instructor revealed the presence of marihuana. The extent to which this drug may have affected the instructor could not be determined. Testing of the student pilot revealed the presence of a sedating over-the-counter antihistamine and a prescription antidepressant.
Conclusion
The sequence of events involved a prolonged takeoff roll followed by a steep left bank and descent into terrain. No mechanical issues were identified in the wreckage. The effects of the substances found in both pilots on the accident could not be established from the available information.