All passengers injured during the crash-landing of Delta Air Lines Flight 4819 in Toronto this week have now been released from hospital.
The wreckage of the CRJ900 has also been removed from the tarmac at Canada's busiest airport Toronto Pearson International.
As operations return to normal and everyone on board is cleared of any life-threatening injuries, attention is now turning to how this incident happened and the factors that meant everyone survived.
The transport authority's probe is ongoing, but it comes as several other jet crashes in North America are still being investigated.
The crash of Delta Flight 4819 will no doubt long be studied both for what went wrong, but also what went right for everyone to escape with their lives.
For the public though, it has undoubtedly raised questions about whether aviation disasters are increasing in frequency and the safety of flying in the future.
Questions about 'flare' on landing
The chief executive of Delta Air Lines Ed Bastian has moved to reassure the company's passengers, saying the pilots of flight 4819 were "an experienced crew".
The flight from Minneapolis was operated by regional subsidiary Endeavour Air, and during an interview on CBS, Mr Bastian said: "There is one level of safety at Delta ... between our main line and our regional jets."
Weather will no doubt be one of the factors investigators are looking at.
Asked about the pilots' experience in wintry conditions, Mr Bastian said: "All these pilots train for these conditions."
Toronto had been experiencing heavy snowfall in the days prior to the crash, but fire authorities were quick to say the runway was "dry" at the time of impact.
When video emerged of the crash-landing at Toronto, several experts offered commentary on the approach and they help shed light on what investigators may be focusing on as they go about their work.
Several experts described the landing of Flight 4819 as flat and noted a lack of what's known as "flare", according to Reuters.
"Everybody who's flown has experienced the flare, but you don't see it, you just feel it," said Dan Elwell, an airline and military pilot who has served as the acting and deputy administrator of the Federal Aviation Authority in the US.
"As you're approaching the ground, suddenly the rate of descent slows down, and then you seem to be just floating for a little while, and then touch down. That's called the flare to prepare the airplane. It's also a form of breaking."
Mr Elwell said the video appeared to show the plane attempted to land without flare.
"In gusty situations, you might even brief prior to landing [and say] we're not going to hold the flare for a pretty touchdown here, we're going to fly it right to the ground so that we can get onto the brakes and take out any wind correction that we've put into the flight controls," he said.
Mr Elwell said: "If you look at the video, the plane is coming down on a certain rate [and] some are saying, too steep. I can't determine that by looking at it."
"But if you're in a descent to landing and you don't flare, then it's going to be a hard landing. If they're doing, 350-feet-per-minute descent without a flare, that's a hard landing. It's not going to crash the airplane.
"If you're coming down at 1,000-feet-per-minute and you don't flare, that's basically a crash-landing."
Mr Elwell said the flight appeared to land "abnormally", but the investigation would determine if that was really the case and if so, why.
"They might have had malfunctions ... they could have had a problem with the flaps. That's what they're going to try and figure out."
The ABC asked Delta Air Lines for a response to questions about the possible lack of flare during landing but did not receive a response.
How 80 people survived the Delta crash
From the moment there was a problem on Flight 4819, a series of products and protocols that have been designed, iterated, and improved for decades kicked in to help the passengers and crew survive.
The FAA lists things such as seat design, low flammability fabrics, insulation, compartment lining, improved exits and seatbelt standards among the components of an aircraft that have been built to help everyone on board survive a crash should something go wrong.
Passengers said they were hanging upside down in their seats after the crash, they released their seatbelts and fell onto what was the ceiling of the aircraft and then evacuated with the help of the crew.
The training and response of that crew undoubtedly helped the story of Delta Air Lines Flight 4819 be a story of survival, according to Mr Elwell.
Good evacuation is the key to air accident survivability.
Mr Elwell said: "The pilots are trained to be the last ones out."
"The flight attendants ... they experienced what the passengers experienced, which had to be the most disorienting and scary thing that you can imagine.
"They lock, they disarm, and they open those doors the same way every single time in their career. And at that moment when they're freaking out ... they now have to recognise that they're doing it all backwards. Instead of pulling down, they got to pull up."
Airplane seats are designed to withstand the force of 16 times the normal pull of gravity, or 16Gs, in a crash, whereas wings and fuselage are designed to handle 3-5Gs.
"In an impact-survivable crash, it's more important for the seats to hold up, giving passengers the best chance of survival," said Raj Ladani, a program manager for aerospace engineering at RMIT University.
Mr Elwell added that the smaller aircraft meant "less distance from the head to the ceiling when they did unbuckle".
"If it had been a bigger airplane, there'd be injuries just in releasing from the seat belts. So there's little sort of things in here that made it work out OK."
Why has North America had a run of crashes?
At the end of last month, a mid-air collision between an American Airlines passenger jet and an army helicopter killed 67 people in Washington DC.
Two days later, a medical flight went down in suburban Philadelphia, killing six people on board and one person who had been on the ground.
In Alaska, a small commuter plane crashed nearly two weeks ago, killing 10 people.
Then audiences watched as news channels showed video of a CRJ900 upside down on the tarmac and perhaps understandably, many of the anchors were asking if there was suddenly more plane crashes happening in North America.
"I've been asked that a lot, ... if you try and to look at it objectively, the answer is, it's it's just coincidence," Mr Elwell said.
He said it was an unusual situation to have had a series of crashes where the investigations for one had not yet been delivered before another incident occurred, but that from what was known so far, each instance "was completely unique".
"One is landing, one is mid-air ... I don't think it's systemic," he said.
"In the US we went for at least 16 years without a [fatal] airline accident. You can't get your mind around carrying 8 billion passengers without a fatality."
Statistics on all modes of transport in the United States, show overwhelmingly road accidents to be the primary cause of fatalities, accounting for 95.4 per cent of all transport deaths.
ABC/Reuters
