As it stands, no one knows why the Boeing 787-9, which is about to become the world’s largest passenger aircraft, crashed on takeoff at LAX on Sunday, killing all 224 people on board.
The NTSB has said it would not release its report for at least a year, while investigators have yet to establish a cause of the crash.
But an official briefed on the investigation said that the most likely explanation is that something went wrong during takeoff.
The official spoke on condition of anonymity because he was not authorized to speak to the media.
Boeing said in a statement on Monday that investigators have not found any conclusive evidence that a mechanical failure was responsible for the crash, but that it has taken a number of steps to make sure it does not happen again.
“We remain committed to conducting thorough and objective investigations, and we continue to provide the NTSB with every opportunity to provide a complete and timely report,” the company said.
“While there are still some questions that need to be answered, we have made significant progress and we will continue to do so.”
But many aviation experts, who are sceptical of the NTSC’s findings, said that even if the company has found no fault with the plane, it should not have been able to fly it.
“The airplane has a lot of performance limitations,” said Tom Pyle, a retired airline pilot and former NTSB official.
“It’s a pretty big airplane.
You’re dealing with very complex, very complicated systems and a lot more weight.
It’s going to have some performance limitations, and those limitations are not going to be eliminated overnight.
It’ll be a little bit longer until we know what happened.”
The Boeing 767 was a single-aisle plane that made its first flight in 1956.
Its predecessor, the 767-200, was launched in 1962.
In 2008, the FAA introduced new safety standards for all new passenger aircraft in the US, including the 787.
It also required all 737-400s to be equipped with advanced electronic systems that would monitor flight characteristics and reduce pilot fatigue.
The new regulations were later relaxed, allowing some smaller jets to fly, but the 757 remains the only Boeing aircraft that can fly on the ground, in the air and at sea.