Loss of Control During Low-Speed Maneuver Due to Sudden Wind Cessation (N71973)

What happened

The pilot was conducting a local area flight when he decided to return to the airstrip. Upon his arrival, he attempted to maneuver the aircraft backward by flying at a low altitude and slow airspeed, positioning the plane just above its stall speed into a steady south wind. As he maintained this critical flight profile over the runway, the wind conditions changed abruptly. The steady south wind suddenly ceased, which the pilot attributed to the surrounding trees blocking the airflow near the airstrip. This sudden loss of headwind resulted in an immediate reduction in airspeed and lift, causing the aircraft to lose control.

Findings

The primary factor contributing to this incident was the unexpected cessation of the steady south wind during a critical phase of flight. The pilot's attempt to back the aircraft up required precise energy management and reliance on wind conditions that were subsequently altered by local terrain features. The loss of control occurred directly as a result of these changing environmental conditions while the aircraft was operating at low speed and low altitude.