The Boeing 737-800 was flying from Thailand to Muan in South Korea on December 29 when it crash landed.Bird feathers and bloodstains were discovered in both engines of the Jeju Air plane that crashed in South Korea,

The first report on last month’s Jeju Air crash in South Korea has confirmed traces of bird strikes in the plane’s engines, though officials haven’t determined the cause of the accident that killed all but two of the 181 people on board.

A preliminary report by the South Korean Ministry of Transport reveals the presence of duck feathers in the engines of the Boeing 737-800 that crashed in December at Muan Airport. At the end of December last year,