Shocking details emerge from investigation into Delta plane that crashed and flipped upside-down

Brand new details have been revealed in the investigation into the Delta Air Lines plane that crash landed and flipped at Toronto's Pearson Airport.

On 17 February, Delta Flight 4819 flipped over after landing on a snow runway, with horrifying footage revealing the extent of the accident.

Luckily, everyone on board the aircraft survived, and out of the 80 people on the plane, 21 sustained injuries.

Footage from inside the plane has since been released on social media, while the American airliner also offered compensation to passengers.

After the crash, which took place at about 2:15pm local time, an investigation into the incident began.

On-lookers would have seen the plane crash and catch fire in a horrific sight, as three people were taken to hospital via air ambulance, while a passenger described the landing as 'very forceful', among other accounts.

A preliminary report has looked into the case of the crashed commercial plane, suggesting that broken landing gear may have been a factor.

After making impact with the runway in the Canadian city, the main landing gear broke, with the undercarriage retracting and wing detaching.

This was followed by a 'cloud of jet fuel' starting a fire, according to a preliminary report from the Transportation Safety Board of Canada revealed, via the Sun.

The report further detailed: "The exact sequence of these events is still to be determined by future examination of the fracture surfaces."

Approximately 3.6 seconds before landing on the runway, it is believed that the speed of descent increased, at 2:12:40 pm.

The Transportation Safety Board of Canada has revealed their preliminary findings (GEOFF ROBINS/AFP via Getty Images)

The local safety board further claimed that just a second later, the plane's safety warning system sounded off inside the aircraft 2.6 seconds before crash landing.

This alarm was said to warn pilots that they were rapidly descending, the board's findings detailed.

The report says that just 1.6 seconds before landing, the aircraft was 'slightly below the glide slope'.

For those that aren't clued up on aviation jargon, this is a system that guides a plane to the runway while landing, to help control descent.

Then, at 2:12:43, the board say that the right main landing gear of the plane touched down, fracturing upon impact and causing it to flip and burst into flames on the snowy tarmac.

It further explained that the cockpit door was stuck, meaning that pilots had to escape via an emergency hatch on the ceiling of the cockpit.

Despite these findings, the official cause of the crash has not yet been announced.

Delta Air Lines have responded to the report's release (GEOFF ROBINS/AFP via Getty Images)

In a statement issued to the media on Thursday 20 March, Delta Air Lines stated: "For everyone at Endeavor Air and Delta, nothing is more important than the safety of our customers and our people.

"That’s why we remain fully engaged as participants in the investigation led by the Transportation Safety Board of Canada.

"Out of respect for the integrity of this work that will continue through their final report, Endeavor Air and Delta will refrain from comment."

Nine Canadian passengers have filed a lawsuit against the airline since the crash, claiming that 'the crew failed to observe the most fundamental procedures for a landing approach', resulting in 'extreme bodily and mental injuries' according to CBC News.