All of the evidence allegedly supporting alternative theories is discussed in the 2013 report of Maciej Lasek commission . For example , the bomb explosion theory is not supported by the fact that the plane 's debris are concentrated in a relatively small 160x50 m area , and no parts of the plane 's interior were found before the first ground contact . However , the bomb theory does have some support : British air accident investigator Frank Taylor , who was involved in the investigation into the losses of Pan Am Flight 103 and British Airtours Flight 28M , challenged the official report . He claimed that the Russian authorities came up with their theory that the aircraft collided with the tree , and then made the evidence fit that theory . He claimed that there were explosions on board the aircraft , including in its wing , immediately before it reached the tree . Russia dismissed his claims
Pan Am Flight 103
Pan Am Flight 103
2010 Polish Air Force Tu-154 crash