Casualties unknown

Stall and Collision During Post-Takeoff Maneuver (N243T)

Sloan, IA, US

On June 24, 1986, a Piper PA18 (registration N243T) operated by Customfarm Svc was involved in an aviation accident near Sloan, IA. Investigators recorded the probable cause as: The pilot's failure to maintain adequate airspeed during a steep turn after takeoff, which resulted in an aerodynamic stall and collision with the terrain. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards

An aircraft stalled during a steep turn immediately after takeoff to avoid another plane, resulting in a ground collision approximately 300 feet east of the runway.

What happened

The aircraft experienced a stall while executing a low-altitude, steep turn shortly after initiating takeoff. The flight ended when the aircraft collided with the terrain approximately 300 feet east of the runway end. According to the pilot's account, the maneuver was initiated to avoid a potential collision with another aircraft in the vicinity. However, statements provided by two independent witnesses did not confirm the existence of such a collision hazard at that time.

The investigation

A thorough examination of the aircraft revealed no evidence of mechanical malfunctions or equipment failures that would have contributed to the accident. The investigation focused on the flight dynamics and pilot actions during the critical phase of flight.

Findings

The primary factor in this accident was the aerodynamic stall resulting from the steep turn performed at a low altitude. While the pilot cited traffic avoidance as the reason for the maneuver, witness testimony contraded the presence of any conflicting aircraft. The decision to perform a steep turn immediately after takeoff, combined with the associated loss of airspeed, led directly to the loss of control and subsequent ground impact.

Probable cause

The pilot's failure to maintain adequate airspeed during a steep turn after takeoff, which resulted in an aerodynamic stall and collision with the terrain.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X33968. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.