Top aviation expert reveals most likely cause of 'death spiral' that brought down Brazil passenger jet and killed 61 people

A top aviation expert has revealed the most likely causes behind what caused a Brazil passenger jet to 'death spiral' in a horror crash on Friday.

A dramatic video from the scene showed a Voepass airlines plane falling from the sky as it plummeted behind a cluster of trees near houses, followed by a large plume of black smoke that killed all 61 people onboard.

Captain Ross Aimer, who has over 40 years of experience flying passenger jets in the US, told DailyMail.com that the tragic plane could have experienced engine failure, flight control malfunction, or if a critical part of the aircraft - like a wing part - fell off.

And once you enter the death spiral, 'it's very hard to get out of it,' he said.

The plane was on its way from Cascavel to Guarulhos when it began the sudden descent. 

Aimer said the most likely cause of the crash was that the aircraft suffered a low speed stall - when the airflow over the wings is too slow to provide enough lift.

This happens when planes move too slowly. The three reasons this happens are either a technical fault, extreme turbulence, pilot error or something hitting the wing, like a bird.

Famously the US Airways Flight 1549 crashed landed on the Hudson river after a flock of birds struck its wing and shut off all power shortly after take off, at around 700 feet.

The ATR-72 aircraft that crashed in Vinhedo, Brazil, was cruising at 17,000 feet, the airline said. 

At that height, it was unlikely to be a bird, which leaves only two other scenarios.

After the plane likely stalled, video showed it spinning in circles as it crashed back down to earth.

This is known as a death spiral, or graveyard spin.

When the wing stalls and dips, and there is no power because the engine has turned off, the plane can go into a spiral where one wing is generating lift while the plane rotates around the other right into the ground.

Last night the airline said in a statement: 'Voepass has activated all means to support those involved. 

'There is still no confirmation of how the accident occurred or the current situation of the people on board.' 

The plane was on its way from Cascavel to Guarulhos cruising at 17,000 feet when it began the sudden descent.

Brazil’s Civil Defense says the plane struck several houses within the residential area, CNN Brasil reported. 

Sao Paulo federal police told ABC that one resident was injured following the impact.

Sao Paulo's Governor Tarcísio de Freitas is also returning from Vitória to manage the situation, according to officials.

'The Superintendence of Technical and Scientific Police (SPTC), the Civil and Military Police are mobilized to rescue the victims,' his agency said in a statement.

'Teams from the Legal Medical Institute (IML) and those responsible for collecting bodies were also sent to reinforce the work.'

The aircraft was PS-VPB, a 14-year-old ATR72-500, according to FlightRadar24.

Data from the flight tracker shows the plane lost 13,000 feet in elevation in under two minutes during the final moments of its ill-fated trip. 

GPS signal cut out just before 1.30pm local time, according to the radar. 

'ATR has been informed that an accident occurred in Vinhedo, Brazil involving an ATR 72-500,' a spokesman for ATR said.

'Our first thoughts are with all the individuals affected by this event. The ATR specialists are fully engaged to support both the investigation and the customer.'

Anac confirmed it is now probing the cause of the disaster. 

This isn't the first time an ATR aircraft has been involved in a deadly crash. 

In 1994, an ATR-72 crashed into the Atlas Mountains while climbing to 16,000 feet on a domestic flight in Morocco from Agadir to Casablanca. It was a pilot suicide and everyone on  board died.

More recently, an ATR-42 crashed in 2017 after flying into severe icing conditions and losing control in Canada. All but one passenger survived.

Despite these incidents, Aimer told DailyMail.com that the ATR-72 is a relatively safe aircraft. 

And these planes are not commonly used for commercial air travel in the Unites States, he said. 

In the US, 'we've been very lucky that we have great training in us and safety record,' Aimer said.

'But nevertheless, we can never let our guards down. We need to do much better in the technology, safety training, and experience.'

The Brazilian Air Force reported that it has sent a team of investigators to the site.

While speaking at an event in Southern Brazil Friday afternoon, Brazilian President Luiz Inácio Lula da Silva called for a moment of silence for those lost in the crash.