What happened
On July 20, 2011, a Neiva 56-C-1 aircraft, registered as PP-HPB, was performing a private pilot training flight at the Ponta Grossa Aerodrome (SSZW) in Paraná, Brazil. The flight was operated by Aeroclube de Ponta Grossa with an instructor and a student on board.
During the takeoff roll, the aircraft experienced a right yaw as the tail lifted, causing it to veer off the runway centerline. In an attempt to abort the takeoff, the instructor took control and reduced engine power to idle. However, the instructor failed to verbally notify the student that he had assumed command. As both occupants simultaneously attempted to correct the heading using the rudder pedals, the student applied the brakes. This sequence of actions caused the aircraft to nose-over and overturn on the runway, traveling 14/0 meters before coming to a complete stop. The aircraft sustained substantial damage, but both occupants escaped without injury.
The investigation
CENIPA's investigation focused on the breakdown in cockpit procedures and the execution of emergency protocols. Although the crew had conducted both standard and emergency briefings prior to flight, the investigation established that the specific actions agreed upon during the emergency briefing were not followed during the actual event.
The investigation also examined the experience levels of the crew, noting that while the instructor was fully qualified, the student had very limited experience, with only two hours of flight time in this specific aircraft model.