What happened
The incident occurred during the final approach phase for landing on Runway 14 at the Linn Creek/Grand Glaize Airport. As the aircraft descended toward the runway, the pilot initiated the application of power to both engines in an attempt to arrest the descent rate and stabilize the approach path.
Despite the pilot eventually applying full power to the engines, the aircraft was unable to recover from the descent profile. The aircraft impacted the ground short of the runway threshold. Following the event, the pilot stated that he was certain he had been caught in a downdraft and was unable to fly out of it.
The investigation
An inspection of the aircraft was conducted following the accident. No mechanical discrepancies were noted by the pilot or observed during the post-accident examination of the aircraft. This indicates that engine failure or other mechanical issues were not contributing factors to the loss of control.
Findings
Weather data provided context for the conditions at the time of the accident. Wind conditions specific to the airport indicated only a slight headwind for the final approach to Runway 14. However, weather reporting stations in the surrounding area indicated winds blowing generally from the southwest at speeds between 9 and 12 knots. The pilot's assertion of encountering a downdraft suggests localized atmospheric instability that was not reflected in the general wind reports for the airport.
Safety message
Pilots conducting final approaches should remain vigilant for localized weather phenomena such as downdrafts, even when general wind conditions appear favorable. Maintaining adequate altitude and airspeed margins during approach is critical to allow sufficient time and power to recover from unexpected sink rates.