The cockpit had the mandated anti-hijacker fortified doors that could prevent locked-out crew or passengers from interfering with a suicide or hijacking into the Southern Ocean . This can be compared to SilkAir Flight 185 ( a posited pilot suicide incident in 1997 ) , EgyptAir Flight 990 ( 1999 ) , LAM Mozambique Airlines Flight 470 ( 2013 ) , as well as the later Germanwings Flight 9525 ( 2015 ) . On 17 February 2014 , less than three weeks before Flight 370 disappeared , Ethiopian Airlines Flight 702 had been hijacked when the co-pilot locked the captain out of the cabin and diverted the aircraft to seek asylum in Switzerland
Germanwings Flight 9525
Germanwings Flight 9525
Malaysia Airlines Flight 370 unofficial disappearance theories