Except that the left turn was pre programmed into the flight computer.

http://abcnews.go.com/ThisWeek/week-transcript-rep-peter-kin...

"KERLEY: The prime minister confirming the report by ABC News the communications gear was deliberately shut down. Now we have learned from a source close to the investigation that whoever was controlling the plane preprogrammed that sharp left turn right off of the flight path, convincing investigators that someone was in control of the jetliner, either a rogue pilot or a hijackers."