At least four separate flights encountered technical issues or emergencies within days of the Ahmedabad Air India crash, forcing sudden flight diversions and raising fresh concerns.

The head of Boeing Commercial Airplanes, Stephanie Pope, met the chairman of Air India on Monday in India, two sources said, as the companies seek to find the cause of last week's fatal crash involving a Boeing 787 Dreamliner.

In 2012 a Boeing jet was deliberately crashed in the Sonaran desert, Mexico and filmed it for television. The test revealed the safest seat to sit in.

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.

An Air India Boeing 787, the same kind of plane that crashed 4 days earlier, was forced to turn around after a midair "technical issue," the airline says.

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.

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.

India's aviation safety watchdog said on Tuesday surveillance conducted on Air India's Boeing 787 fleet did not reveal any major safety concerns, days after one of its jets crashed, killing at least 271 people.