What happened
The private pilot attempted to initiate a takeoff with frost present on the upper surfaces of the aircraft. During the ground roll, it became apparent that the airplane was not generating sufficient lift to become airborne before the end of the available runway. The pilot aborted the takeoff and steered the aircraft off the paved surface into a snowberm.
The pilot later stated that he believed the runway length was approximately 2,000 feet. However, Federal Aviation Administration records indicate the actual usable runway length was only 1,250 feet. The presence of frost on the wings significantly degraded aerodynamic performance, contributing to the inability to achieve flight within the shortened distance.
The investigation
A review of official FAA records confirmed the discrepancy between the pilot's perception and the actual physical dimensions of the runway. The investigation focused on the condition of the aircraft surfaces prior to the attempted departure. It was determined that frost had accumulated on the upper wing surfaces, which disrupted airflow and reduced lift capability.
Findings
The primary factors leading to this incident were the failure to remove frost from the aircraft prior to flight and a miscalculation of available runway length. The pilot's assumption regarding the 2,000-foot runway length was incorrect, leaving insufficient distance to accelerate and climb out after aborting due to poor lift generation.
Safety message
Pilots must ensure all frost, ice, or snow is removed from critical surfaces before flight. Additionally, accurate knowledge of runway lengths at the departure airport is essential for safe takeoff planning.