A former pilot has a chilling theory about what really happened to the missing Malaysia Airlines flight MH370. Even though it's been 10 years since the plane disappeared, we still don't know why it vanished.
The official search for the plane stopped in 2017, but people who know a lot about planes have kept looking for answers. They want to know what happened on that sad day of March 8, 2014.
One person who used to control air traffic and a former pilot think that someone flying the plane took it off its course on purpose. They believe it flew for several hours before it crashed into the Indian Ocean.
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The plane was going from Kuala Lumpur to Beijing when it disappeared. The signal that tells where the plane is was lost when it entered Vietnamese airspace.
The Malaysian Air Force used a special radar and saw that the plane made a sharp left turn and went back the way it came, reports the Mirror. Near the island of Penang, the plane flew north-west and over the Andaman Sea. That's when it disappeared from the radar.
But for the next six hours, another satellite in the Indian Ocean was connected to the flight. Experts used this information and also looked at where bits of the plane that were found had drifted to.
They think the plane flew south until it ran out of fuel and fell into the southern ocean. This place is somewhere between south-western Australia and Antarctica - an area known as the 7th arc.
"We're confident only an experienced pilot could do it," Jean Luc Marchand, a former air traffic manager at Eurocontrol, said in the new BBC documentary, Why Planes Vanish: The Hunt for MH370. "They took care to be invisible, not traceable, to not be followed."
The show, which aired on Wednesday night to mark the 10-year anniversary tomorrow (Friday), looks into different pieces of evidence and hears from experts and some families of the victims. Retired commercial pilot Captain Patrick Belly agrees with Jean and thinks a 'skilled pilot' was flying the plane until it crashed about seven hours later.
To hide the plane, they say the person flying turned off the satellite phones so the crew couldn't talk to anyone on the ground. Pilots can turn off certain things in the plane, and they can also change how the plane keeps the air inside safe if something goes wrong.
Ex-pilot Belly shares his thoughts in the documentary: "The problem was that the passengers and crew were going to find the plane was no longer going to Beijing. My theory is that MH370 was depressurised. It's quite easy for a pilot to depressurise an aircraft - all you have to do is switch the valves to manual."
When a plane loses air pressure, the air gets sucked out of the cabin. If this happens, emergency oxygen masks can help passengers breathe for about 20 minutes. But in the cockpit, there's enough oxygen for the pilot to last more than 20 hours.
"This made it possible to neutralise all the people behind in the cabin," Belly continued. "The person who took control of this plane did something extraordinary, which led to the death of 239 passengers and put it at the bottom of the Indian Ocean and we have no idea why he did that. This case, I am convinced was executed by someone who was a pilot because no one else was capable on this plane".
Richard Godfrey, a retired aerospace engineer who has worked with NASA, Boeing and Airbus, is a volunteer expert trying to solve the mystery of the missing MH370. He featured in the BBC documentary and said he has been working eight hours a day for the past ten years to figure out what could have happened. "In my mind, there is no aviation mystery that cannot be solved," he said in the documentary.
"Aircraft do not vanish. They always leave a trail of breadcrumbs - might be a trail of physical or electronic evidence. Thorough searches led us to somewhat the end of the road. Have we missed something?"
Mr Godfrey has used cutting-edge technology to examine radio signals that cover the Indian Ocean. He believes he's found proof of the plane's last flight path using a system called Weak Signal Propagation Reporter, or WSPR.
This system works by sending out pulses every two minutes. When a plane crosses a radio signal, it causes a disturbance.
Every signal is recorded in a database and on March 8, 2014, tiny disturbances could be traces of MH370, Mr Godfrey suggests.
"I found a disturbance on the night it disappeared," he said. "I picked it up again, and had a eureka moment."
He has identified 130 disturbances over the Indian Ocean, ending just beyond the underwater search from the 7th arc within about 30km.
He added: "We haven't found it because we didn't look wide enough. It goes beyond where it ran out of fuel because it made changes to speed, and altitude. It implies an active pilot right until the end of the flight."
The flight was piloted by 53 year old senior pilot Zaharie Ahmad Shah, who had been with the airline for 30 years, and first officer Fariq Hamid, 27, who was on his last training flight. Over the years, there have been many rumours about Zaharie's mental health, with reports saying his wife left him the day before the tragic day due to his alleged affairs.
The documentary highlighted that Zaharie, the pilot, practised a similar flight deep into the remote southern Indian Ocean on a simulator less than a month before the plane disappeared. Many people believe that Malaysia didn't share these controversial details in a public report.
These details seem to be the strongest proof that the captain purposely flew the plane off-course as part of a planned murder-suicide plot.
New York magazine got hold of a document showing that the FBI found six deleted data points from a detailed Microsoft Flight Simulator X program. The data points show a 'flight' starting from Kuala Lumpur, going northwest over the Malacca Strait, then turning left and heading south over the Indian Ocean, until it runs out of fuel over an empty stretch of sea.
Search officials think MH370 followed a similar route, based on signals the plane sent to a satellite after it stopped communicating and went off course. While the actual and simulated flight details were not exactly the same, the assumed final location of the jet is the same as that of the simulated flight - about 900 miles from a remote part of the southern ocean where officials think the plane crashed.
Malaysian officials have consistently denied allegations that Zahaire intentionally crashed the plane into the sea, and they did not include the flight simulator details in the Factual Report released on the first anniversary of the disappearance. In 2018, Australian investigators also dismissed claims that the pilot deliberately caused the flight to disappear.
The Australian Transport Safety Bureau insists that the pilot was unconscious during the final moments, with the plane out of control.
