Pilot errors caused fatal helicopter collision near Eura, investigation finds

Human error caused a helicopter collision near Eura that killed five people last year, according to an investigation published by Finnish broadcaster Yle.

The pilots flew in formation or in a formation-like manner throughout the journey. Before reaching Eura airfield, the helicopters changed positions relative to each other and approached from an angle that made it difficult for the pilots to see one another’s movements. They were also unaware of each other’s intentions, the investigation found.

Investigators said formation flying carries a risk of collision, making it essential for pilots to agree on procedures in advance and follow them closely.

The helicopters had no technical faults that could have caused the crash. Their emergency locator transmitters did not activate, but investigators said this would not have affected the chances of survival in this accident.

The helicopters were travelling from Tallinn to Piikajärvi in Kokemäki when they collided near Eura airfield on May 17, 2025. Both crashed into a forest, killing all five people on board. One helicopter caught fire on the ground and its fuselage was destroyed.

Finland’s Safety Investigation Authority and Estonian investigators took part in the investigation.