On August 10 , 2005 Flight 103 , a Sikorsky S-76 , crashed into the sea near Tallinn , Estonia , three to four minutes after taking off . The craft was carrying 14 people , all of whom were killed : six Finnish , four Estonian and two American passengers , and two Finnish crew members . The disaster was caused by the failure of the power steering system of the American-built helicopter . According to Estonian authorities , no distress signals of any kind were received . However , after examining the helicopter 's black box it has been reported that the pilots had attempted sending one , but was n't received because an air traffic controller in Tallinn Airport was reading back a landing permit . The black box also revealed that the pilots had remained calm and attempted a safe landing in a " by the book " fashion
Flight 103
Copterline Flight 103
Copterline Oy