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The five people killed when an Amazon cargo jet ran off a runway at Miami International Airport on Sunday were inside a van carrying seven people from a cleaning company and an SUV hit outside of airport property, the U.S. National Transportation Safety Board’s (NTSB) chairperson said on Monday.

Jennifer Homendy didn’t detail how many people were in the SUV or where the dead were found, but she called the scene of Sunday’s crash “utter devastation.”

U.S. federal investigators examining why an Amazon cargo jet barrelled off the runway have already been able to recover both the voice and data recorders from the aircraft, she said.

Video of Sunday’s landing appears to show the Boeing 767 remaining airborne well down the runway before touching down. Homendy called on anyone with relevant video or photos from the crash to send their footage to the NTSB via its website.

Investigators will examine the plane’s speed and braking, weather and wind conditions, the aircraft’s mechanical condition and other factors that could have contributed to the deadly overrun.

The aircraft overran the runway just before 2 p.m. ET on Sunday after arriving from San Juan, Puerto Rico, and plowed across a road used by warehouse workers and other businesses that surround the airport.

Wide shot of a crashed airplane with emergency vehicles visibleInvestigators say they will focus on the moment of touchdown and why the pilots didn’t abandon the landing if they had overshot the runway. (David Fischer/The Associated Press)Pilots, people in cars trapped

The crash, which sent thick black smoke billowing into the sky, trapped the pilot and co-pilot in the cockpit and some occupants in cars, said Miami-Dade Fire Rescue Chief Ray Jadallah. The agency said crews also had to extricate a person who was trapped under a vehicle.

The typical landing zone for a plane is within the first 914 metres of a runway, experts said. If the cargo jet was beyond that area, it should have aborted the landing and gone around for another try, aviation safety expert Steve Arroyo said.

Mary Schiavo, a pilot and former inspector general of the Transportation Department, said video posted online shows the Amazon plane floating above the runway for an extended period without flaring the nose upward to force the main landing gear onto the ground.

It wasn’t raining at the time, but dark storm clouds loomed and strong winds were reported. Schiavo said that if the plane had a tail wind, that could have contributed to it floating further down the runway.

“A tail wind would certainly add to your troubles if you’ve already given up a good chunk of the runway by not touching down and landing right away.”

WATCH | Investigating the Amazon cargo plane crash:

5 dead after Amazon cargo plane leaves runway, smashes into cars

An Amazon cargo plane overran the runway at Miami International Airport on Sunday, slamming into cars, killing five people and injuring several others. An investigation into what caused the crash is underway.No safety system on Miami runways

The Miami airport is not equipped with engineered material arresting systems (EMAS) that the U.S. Federal Aviation Administration (FAA) says have been installed at more than 120 airports countrywide to safely stop planes that do go past the end of a runway.

Those beds of lightweight, crushable material at the end of a runway have been credited by the FAA with helping save at least 497 lives aboard planes that overran runways.

Miami’s airport appears to be in compliance and wasn’t required to have an arresting system because it has a 304-metre safety buffer at the end of its runways, said Mike O’Donnell, the FAA’s former director of airport safety and accident investigations.

The NTSB’s Homendy told reporters on Monday that the question of whether EMAS should be required at every airport and might have prevented Sunday’s tragedy in Miami will be a key part of the NTSB investigation.

The requirement was prompted by American Airlines Flight 1420 overrunning a runway at Little Rock National Airport in Arkansas in 1999, killing nine.

The Prime Air plane came to rest beside a roadway near two semi-trucks, images showed. The aircraft appeared to be resting on its belly and was largely intact despite the fire.

History of aircraft

The flight had been operated by 21 Air, a cargo carrier based in North Carolina. The 32-year-old Boeing 767 was originally built to carry passengers and flew for several airlines for more than two decades before being converted to a cargo plane in 2015, according to flight-tracking site Flightradar24.

Schiavo said the NTSB will also closely examine the maintenance history of this plane — particularly since it has a history of foreign ownership, including by a Russian company.

The crash halted flights at the busy travel hub for much of the afternoon and continued into Monday.

The crash halted flights at the busy travel hub for much of Sunday afternoon and continued to hamper air travel into Monday.

Miami International Airport said two of its four runways remained closed in the morning and operations would be affected throughout the day because of aircraft and flight crews not arriving there due to Sunday’s cancellations.

Amazon said in a statement that it would co-operate with any investigation.

“We’re heartbroken to learn that five people lost their lives in today’s incident at Miami International Airport,” the company said. “Our deepest sympathies go out to the families, loved ones, and all those affected by this devastating loss.”

Last year, a UPS plane crashed after losing its engine while accelerating down the runway at Louisville Muhammad Ali International Airport. The crash killed all three pilots and 12 people on the ground. Twenty-three people were injured.