Then-Malaysian prime minister Najib Razak claimed there was a “high degree of certainty” that communications with MH370 was taken out deliberately.
Now, retired Qantas captain Mike Glynn has claimed that there are ways in which someone could have incapacitated passengers from inside the plane.
Talking to Sky News, he said: “[They’d] make sure the door’s locked, so no one can get in. Nothing that anyone could do.”
‘When you open these outflow valves, the aircraft depressurises very quickly.
“If the aircraft’s not going to descend, you’ll start to feel very hypoxic within three or four minutes.”
Hyproxia occurs when the body does not get sufficient oxygen, and can result in a loss of consciousness.
Mr Glynn also said that it would have been easy for someone to keep people out of the cockpit.
He explained: “The door will automatically close, and you can lock it by this switch.”
He continued: “And you can also, there’s a manual deadbolt that prohibits any sort of entry into the flight deck. You can have a full-on attack on the door, it’s not going to change a thing.”
When MH370 went missing, a number of different areas were suggested as potential places where the plane could have crashed.
Now, Pilot Patrick Blelly and aerospace expert Jean-Luc Marchand have said a new area could be searched in the coming days.
Marchand said: “We have done our homework. We have a proposal … the area is small and considering new capabilities it will take 10 days.
“It could be a quick thing. Until the wreck of MH370 is found, nobody knows (what happened). But, this is a plausible trajectory.”
He added: “We think, and the study that we’ve done has shown us, that the hijacking was probably performed by an experienced pilot.
“The cabin was depressurised … and it was a soft control ditching to produce minimal debris. It was performed as to not be trapped or found.
“Certainly, the aircraft was not visible except for the military. The guy knew that if search and rescue would be triggered it would be on the flight path.”
The experts say the plane changed direction in “no man’s land” in between Thai, Indonesian, Indian, and Malay airspace.
Marchand said: “What would have been the intention of the hijackers? This is a very sensitive area. You have Thai, south Indian radar coverage, but they don’t care.
“You have reached the war range, but also the radar, so this zone here is in no man’s land. No control, no visibility for Kuala Lumpur. So, the guy can do whatever he wants.”
