Airplane crashed spinning down from the sky

In Brazil, a local turboprop aircraft carrying 61 individuals crashed in a suburban area near Sao Paulo. The flight, operated by Voepass, departed from Cascavel and was en route to Sao Paulo's international airport when it went down in Vinhedo, approximately 80 km northwest of the city. Witnesses reported seeing the aircraft spinning uncontrollably before crashing. It is believed that the cause of the crash was due to ice accumulation on the plane, resulting in a stall and loss of control. This is supported by the fact that the aircraft was flying in an area where ice was forecasted and the de-icing system was deemed functional before takeoff. This incident is similar to a previous event in 1994 where an ATR-72 crashed in Indiana due to ice buildup. Tragically, all 61 individuals on board lost their lives in the crash. The "black box" of the plane has been recovered and is currently being examined to determine the exact reason for the crash. Investigators are also examining weather conditions, engine and control system performance, and other factors to determine the cause of the accident.

Airplane stall is probably the reason for out of control spin

During an aircraft spin, the plane experiences a stall and yaw, resulting in perpetual rotational forces. These forces keep the aircraft in a spin until the pilot makes positive and correct control inputs to stop them. In a fully developed spin, the plane follows a spiral flight path around a downward axis, while also pitching, rolling, and yawing towards the spin axis. The descent rate during a stable spin in light aircraft is usually around 5000 to 8000 feet per minute. While all aircraft are capable of spinning, not all can be recovered from a spin. The critical angle of attack for a stall is when the airflow following the upper wing surface separates and becomes turbulent, reducing lift. Pilots use a quoted airspeed (specific to weight and configuration) to correspond to this stall angle for each aircraft. However, in actuality, this speed may vary depending on the weight the wing must support. Airspeed is an indirect measurement of an approaching stall. The quoted stall speed reflects the 1G straight-and-level speed at a nominal weight. As weight increases or turns are made, the stall speed also increases.

A similar accident with the ATR-72 plane type

On October 31, 1994, American Eagle Flight 4184, also operating as Simmons Airlines Flight 4184, was a domestic passenger flight from Indianapolis, Indiana to Chicago, Illinois, in the United States. While flying this route, the ATR-72 encountered severe icing conditions, lost control, and crashed into a field. Tragically, all 68 individuals on board were killed in the high-speed impact.