Investigators in India are studying the black boxes of a Boeing 787 Dreamliner after recovering them from the aircraft wreckage to ascertain the cause of last week’s plane crash that left at least 270

In the wake of the Air India flight that crashed moments after take off last week leaving just one survivor, two other Boeing 787s turned around shortly after taking off on June 16, one from Heathrow and another from Hong Kong.

Indian authorities have ordered what they called “extended surveillance” of all Boeing 787 aircraft in the country’s fleet while they investigate the cause of the Air India crash.

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.

There have been cases of a very small number of survivors in very serious accidents, but it is "very rare" for there to be only one, a professor told Newsweek.

The black boxes will provide cockpit conversations and data related to the plane’s engine and control settings to investigators and help them in determining the cause of the crash.

A Boeing and AAIB investigation team arrived in Ahmedabad on Monday to inspect the Air India crash site. The June 12 disaster involving a Boeing 787-8 Dreamliner resulted in over 270 fatalities, including former Gujarat CM Vijay Rupani.