The investigation into Air India flight 171 crash opens up questions into the many concerns surrounding Boeing's 787.

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.

Air India said it has completed such safety checks on nine of its Boeing 787 aircraft and is in process to complete it for the remaining 24 planes.

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.