Iran conflict are casting a shadow over what was supposed to be a relatively upbeat Paris Air Show. Air India Flight 171 was the first-ever deadly crash of a Boeing 787 Dreamliner. Boeing CEO Kelly Ortberg and Stephanie Pope,

The harrowing incident saw the London-bound Air India Boeing 787 Dreamliner plunge into a residential area in Ahmedabad, Gujarat, killing 241 passengers on board and another 38 people on the ground. Now, commercial airline pilot and crash analyst Steve Schreiber has pointed to fresh footage as a key breakthrough in understanding what went wrong.

The crash happened just weeks after the company cut a deal with the U.S. government to avoid taking criminal responsibility for a pair of deadly crashes in 2018 and 2019.

It’s also the latest disaster to hit the beleaguered American aerospace giant — which has been dogged by a door that blew off a 737 jet, a leaky spacecraft that stranded astronauts on the International Space Station for months, as well as politically damaging delays in outfitting the new Air Force One jets.

Investigators hope the device will provide clues about the cause of the accident that killed 241 passengers and crew, and a number of others on the ground.

Last year, the F.A.A. said it was also investigating claims by a Boeing engineer that parts of the fuselage, or body, of the Dreamliner were improperly fastened together, which the whistle-blower said could cause premature damage to the plane over years of use.