What happened
The pilot informed an FAA safety inspector that he made the decision to initiate takeoff in a downwind direction on Runway 27. This choice was driven by the physical characteristics of the airfield, specifically noting that the runway surface slopes downward toward that end. The pilot estimated the tailwind component at between 2 and 5 knots during the initial phase of the roll.
After becoming airborne, the aircraft remained in ground effect for a period. During this time, the wind conditions intensified significantly beyond the initial estimate. The increased wind speed negatively impacted the aircraft's performance, preventing it from gaining sufficient altitude or distance. Consequently, the airplane was unable to clear the line of trees situated at the end of the runway.
The investigation
A review of the incident focused on the pilot's stated rationale for the takeoff configuration. The investigation confirmed the pilot's account regarding the runway slope and his perception of the wind conditions prior to rotation. No mechanical failures or other operational errors were cited in the provided narrative beyond the decision to fly downwind.
Findings
The primary factor contributing to the accident was the increased tailwind encountered shortly after takeoff. The combination of the downwind departure and the sudden wind pickup resulted in inadequate climb performance. This loss of energy prevented the aircraft from clearing the obstacle at the runway end. The pilot's decision to utilize the sloped runway for a downwind takeoff played a critical role in the outcome.