Newly uncovered flight documents have revealed that extra fuel and oxygen were added to the plane before it took off and "headed to oblivion".
MH370 disappeared 10 years ago when the aircraft vanished from flight radar over the South China Sea.
British pilot Simon Hardy says flight documents could prove that the plane's disappearance was planned out.
The Boeing 777 pilot, who joined the search with the Australian Transport Safety Bureau (ATSB) in 2015, believes the plane's pilot would have been in control the entire time before precisely plunging the plane into the ocean so it could never be found.
Newly uncovered flight documents have revealed that extra fuel and oxygen were added to the plane before it took off and 'headed to oblivion'GettyDespite oxygen not being low, technical logs show that the cockpit's levels were topped up.
Hardy explained the oxygen did not need topping up as it was just a short journey to Beijing but a "bizarre" scribble shows that the oxygen for the cockpit was added last minute but not for the cabin crew or the passengers.
"It's an incredible coincidence that just before this aircraft disappears forever, one of the last things that was done as the engineer says nil noted[no oxygen added], then someone else gets on onboard and says it's a bit low," he told The Sun.
"Well it's not really low at all… it's a strange coincidence that the last engineering task that was done before it headed off to oblivion was topping up crew oxygen which is only for the cockpit, not for the cabin crew."
Hardy added that the the cabin crew and passengers would have likely fallen unconscious and died as the cabin was depressurised.
He said the pilot could have then carried out the "suicidal" plan without interruption.
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Other documents from 2014 show that the maximum amount of extra fuel which can be held by a Boeing 777 flight - 3,000kg of fuel - was added.
Hardy said the aircraft would have had 30 minutes more flying time.
"If you want to do a good ditching, you do it in daylight or at least half daylight," he said.
"In the case of MH370, if the pilot has another half an hour of fuel it will be daylight.
"Another half an hour of flying would be another 244 nautical miles and the most important thing is that it will be dawn."
According to Hardy, the plane was plunged into a spot known as the Geelvinck Fracture Zone.
The trench is hundreds miles long and troubled with earthquakes meaning the jet could be buried beneath rocks under the waves of the Southern Indian Ocean.
Experts hope a new search for MH370 will be opened later this year
GettyExpert Hardy said the ditching would need exact precision because if there was not enough fuel, the pilot would not be able to carry it out with no debris.
He said: "You don't want to bring a lot of fuel and then not use it, because it's gonna be creating an oil slick even many years later.
"Even if you have tonnes and tonnes of fuel and it's at the bottom of the Geelvinck Fracture Zone it still will be leaving a plume of oily rainbow residue on the surface for years.
"He wants to preserve the aircraft but he doesn't want to save the passengers.
"It's all part of it being planned meticulously for, 'how can I make it disappear, I don't want tonnes of fuel but I do wanna go as far as possible.
"If you're of a motive to make it disappear then only one solution is to ditch it as neatly as possible, so it sinks to the bottom with all the people inside, with all the flotation devices inside, with no baggage.
"That's what you want, if you want to make it disappear, you don't crash it you ditch it."