Widerøe Flight 839, also known as the Værøy Accident (Norwegian: Værøy-ulykken), was a crash into water of a de Havilland Canada DHC-6-300 Twin Otter just after take-off from Værøy Airport in Norway. The incident occurred on 12 April 1990 at 14:44, and killed all five people on board. The cause of the accident were strong winds that exceeded the structure's tolerance, causing the tail rudder and tailplane to crack so the plane became uncontrollable. Impact occurred 63 seconds after take-off and 8 seconds after the crack.