All three people on board, including the pilot, a flight nurse and a paramedic, were killed on 20 January in western Oklahoma

A dead goose was found in part of the flight control system of a medical helicopter that crashed in western Oklahoma, killing all three people on board, according to a preliminary report by the National Transportation Safety Board (NTSB).

While it highlights the goose’s presence on board, the report stops short of specifying a suspected cause of the deadly crash. The report notes that other geese were found in the debris field left by the wreck.