Pilot maneuvers blamed for fatal Eura helicopter collision, investigation urges stricter formation rules

The safety board Onnettomuustutkintakeskus (Otkes) concluded that the deadly May crash of two civilian helicopters near Eura resulted from the pilots' conduct rather than any technical malfunction. Both helicopters were traveling from Tallinn to Kokemäen Piikajärvi airport and were operated in a formation-like pattern, a maneuver for which the crews lacked prior experience. Their close spacing and shifting relative positions made visual detection difficult, causing a mid-air impact that killed five people and ignited one aircraft on the ground.

Investigators noted that the pilots may have been distracted by aircraft systems, passengers, or airport activities before the collision. The investigation recommends expanding formation-flight risk information in general aviation and updating emergency locator transmitter standards, as the ELTs failed to activate in this incident.