 The Board of Inquiry was convened on 31 January 2005 and reported in August.Without witnesses, no in-flight data recorder (ADR) and lacking evidence, the investigation worked by eliminating possible causes for the crash and then analysing remaining possibilities.The Board came to the conclusion that the aircraft had been shot down by ground fire; a projectile had penetrated the starboard wing fuel tank, causing a fire in the wing, the subsequent explosion leading to the loss of 23 ft of wing including the aileron.