Official documents detailing an investigation into the missing Boeing 777 showed the tragic last message sent to the aircraft after an unanswered call to Captain Zahaire Ahmad Shah.
The note, to appear in the Control Display Unit used by the pilot in the cockpit, read DEAR MH370. PLS ACK TEST MSG. RGDS/OC.
The Daily Star reports that sadly however it failed to send each time, suggesting the aircraft could have already come into trouble by then.
The message was sent and resent at 6.39pm, 6.40pm and 6.41pm to the computer system used to perform various tasks such as programming the flight computers.
The detail had previously been left out of official reports, but came to light this week after Malaysia’s Ministry of Transport released the full log of communication between the plane and air traffic control.
Flight MH370 vanished without a trace on March 8, 2014 with 239 people on board.
In the moments before it disappeared, the plane turned off course and went off radar with investigators assuming it nose-dived into the Indian Ocean.
But some have claimed Captain Ahmad had crashed the plane in a suicide mission, a theory that has been proved.
The event had since remained a mystery and has triggered many conspiracy theories.
Aussie crash investigator Peter McMahon made a sensational claim he had found wreckage from the flight which he said was riddled with bullet holes, sparking fears the aircraft had been shot down.
Another theory is that the plane could have been hacked and reprogrammed to fly to a different location.
Historian Norman Davies said the plane was equipped with special technology designed to prevent another 9/11 hijacking disaster and claimed cyber-spooks hacked into the programme due to the plane carrying sensitive information.
Another theory was that Russian President Vladimir Putin was involved.
Andre Milne said flight MH370 made a “soft ditch” landing in the Bay of Bengal and that Mr Putin was aware of this from the start.
Mr Milne said: “The reason President Putin did not raise his hand and march in and say we found it is because technically he would have been admitting committing espionage.”
One of the most common conspiracy theories is that there was a mysterious secret passenger on board that took control of the plane and flew it into the ocean.
Again, this one is from Mr Milne who told Express.co.uk the plane’s official manifest says that 239 people went missing.
He said there were officially 226 passengers on the flight, with four having failed to board, and another 12 crew, making a total of 238 passengers.
He said: “So now we have an ‘extra’ person on board MH370.
“The extra passenger likely acted in conjunction with larger external operational support to take full command and control of the cockpit of MH370.’
A spokesperson for the official MH370 investigation team said: “We are aware of this discrepancy. The actual number of passengers on board was 227.”