article_snippet.sent: The theory has surfaced in a letter to the respected Financial Times newspaper from aviation boss Matt Andersson, president of Chicago-based Indigo Aerospace.
article_snippet.sent: Scroll down for video .
article_snippet.sent: Mr Andersson says the French accident investigators are clear that the stricken plane 'accelerated in French descent'.
article_snippet.sent: 's and his parents house after it emerged that his 'deliberately' crashed the Airbus A320 jet into the Alps .
article_snippet.sent: Former commercial pilot Jay Rollins told US television channel
article_snippet.sent: MSNBC last month: 'This aircraft is highly computerised. '