A NASCAR legend has shared a chilling theory about what may have gone wrong in the horror jet crash that killed retired driver Greg Biffle and six others.

The doomed flight was rocked by reports of a “large, loud pop” during takeoff before it circled back in the sky.

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Greg Biffle with daughter Emma in 2016Credit: Getty

National Transportation Safety Board (NTSB) investigators view the wreckage of a Cessna 550 business jet after several people, including former NASCAR driver Greg Biffle, were killed in a crash during severe weather at Statesville Regional Airport in Statesville, North Carolina, December 19Credit: Reuters

SRX driver Kenny Wallace gave a chilling theory about the Cessna C550 crashCredit: Getty

In Statesville, North Carolina, Biffle’s close friend Kenny Wallace said he believes the Cessna Citation lost a motor, leaving the crew fighting drag and a lack of horsepower as they tried to get back to the runway.

Biffle was killed along with his wife, Cristina, and their two children, Emma and Ryder, when the private jet went down.

Craig Wadsworth, Dennis Dutton, and Dutton’s son Jack were also killed, according to a statement from the families.

Seven people died in total after the Cessna C550 jet, owned by Biffle, crashed at Statesville Regional Airport around 10:15 am.

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An investigation to establish the exact cause of the tragedy is underway.

Wallace laid out his thinking on his YouTube channel as he tried to make sense of the final minutes.

“Here’s what I think,” he said.

“I think the plane took off, I think they lost a motor, and then, I guess it started having a lot of drag on it. In other words… yes, we know it should fly just perfectly with one motor.”

“I think we lost a motor. That’s where all the up and down was taking place. They decide to come back. The flaps are down, and they don’t have any horsepower.”

“There was so much drag and they had the throttle wide open, they just didn’t make it. I think that’s what happened. They just didn’t make it to the runway.”

“May the Lord be with everybody, this is a very heartfelt discussion. It was a very tragic loss. Everybody wants to know what happened. I think it was a tragic loss of life and that’s what I respectfully think is what happened.”

“It has been a sad, sad couple of weeks here with the Greg Biffle tragedy.”

The flight’s final moments have also been haunted by a desperate message sent from on board.

Biffle’s mother-in-law, Cathy Grossu, told People she received a text from her daughter moments before the crash that said: “We’re in trouble.”

Who was Greg Biffle

Former NASCAR driver who raced at the sport’s highest levels for more than a decade.
Two-time national-series champion: Truck Series champ (2000) and Xfinity/Busch Series champ (2002).
Rookie of the Year twice: Truck Series (1998) and Xfinity/Busch Series (2001).
19 wins in 515 starts, with a best points finish of second overall in 2005.
Moved up through Trucks and Xfinity/Busch before becoming a long-time Cup regular.
Named to NASCAR’s 75 Greatest Drivers list in 2023.

Grossu added: “She texted me from the plane and she said, ‘We’re in trouble.’ And that was it. ‘So we’re devastated. We’re brokenhearted.’”

Cristina’s mom said the group had been heading to Florida for a “birthday trip” when the crash happened.

“To think that they would be killed on a birthday trip, that was just such a fun time for the family,” she said.

“And to see the horrific way that it ended, it’s just, it is so hard to bear. I cannot believe they’re gone.”

She said she had seen Cristina and Biffle only hours earlier, after they visited her at her home.

“I don’t remember what the last words that I said to my daughter or to Greg or to my precious Ryder,” she said.

Horrifying video shows moment Greg Biffle’s plane explodes into flames after crashing – killing NASCAR driver and familyCredit: Bobby Renwick via Storyful

“I don’t remember. I know we hugged, but I don’t remember those last words and that’s going to haunt me. But they were happy.”

Friends and family told The US Sun the jet erupted into a fireball just minutes after takeoff from Statesville on December 18.

Former neighbor Jonathan Donahue said the trouble began almost immediately after the jet left the ground.

“All I know,” he said, “is that there was a large, loud pop, like something broke on the plane at takeoff, and he immediately had to turn around and make an emergency landing.”

Flight data backs up that account, showing the jet climbed sharply before turning back toward the airport.

Its speed and altitude fluctuated as the pilots battled poor visibility in low clouds and drizzle.

Moments later, the jet clipped light poles, smashed into a tree line, and exploded less than a mile from the runway.

No distress call was ever made.

WCNC chief meteorologist Brad Panovich said after looking at public flight data that the jet took off, then circled back, pointing to a possible mechanical issue.

The Federal Aviation Authority said that the Cessna C550 crashed while attempting to land.

Dutton, a 40-year aviation veteran and recently retired Delta Airlines pilot, died alongside his son Jack, an Auburn University junior who dreamed of becoming a pilot too.

Jack had just earned his FAA Instrument Rating, a milestone he proudly shared online weeks before the crash.

Aviation expert Michael Henderson told The US Sun he believes it was “very likely a single engine problem” on a “very reliable jet.”

“He had power. He was able to climb. He could have made it back,” Henderson said.

Henderson claimed poor visibility would have sealed their fate in the low fog and drizzle.

“He was using visuals rather than instruments. There was low fog and drizzle, and he was having a real hard time seeing the airport,” Henderson said.

“He hugged the field because he needed to see it.”

“He had plenty of power,” Henderson also claimed. “He just didn’t have the visibility and he was too low.”

The cockpit voice recorder has been recovered, but friends fear final answers could take 18 months or more.

AU student Jack Dutton, his father Dennis Dutton, and family friend Craig Wadsworth were also killed in the crashCredit: Instagram / jack99938

Greg Biffle and his daughter Emma with Vice President JD VanceCredit: Getty

Biffle during the Camping World Superstar Racing Experience event at Five Flags Speedway on June 18, 2022, in Pensacola, FloridaCredit: Getty