A source from the investigations team told Le Parisian: “Some abnormal turns made by the 777 can only be done manually. So someone was at the helm.
“It is too early to state categorically. But nothing is credited that anyone else could have entered the cockpit.”
Aviation experts have suggested the plane was hijacked, stolen or suffered a systems failure.
After its disappearance, search operations began in the Indian ocean but the Boeing 777 has never been found.
US aviation writer William Langewiesche said Mr Shah was often lonely and sad during the flight.
He wrote in The Atlantic: “There is a strong suspicion among investigators in the aviation and intelligence communities that he was clinically depressed.”
Mr Langewiesche went on to claim Mr Shah reheated the crash in a flight simulator.
While investigating the flight simulator, Dr Victor Iannello revealed that of all the flight simulations the pilot ran, the one closest to MH370 was not a continuous flight.
Every other experiment involved Mr Zaharie taking off with the airplane and landing.
However, with the plane profile that matched MH370, the captain continually jumped forward before releasing some fuel until it was all used up.
Dr Iannello believes that the near identical simulation was the captain’s way of replicating his fatal crash.
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