The crash of a Boeing 787 passenger jet in India minutes after takeoff on Thursday is the latest incident that adds to woes at the troubled U.S. planemaker.

Air India and Boeing are in the midst of significant turnarounds, but knowing the cause of the crash of Flight 171 will take a lengthy investigation.

As the investigation continued Friday into the horrific Air India Boeing 787 Dreamliner crash that killed at least 290 people, the sole survivor is doing well but is "psychologically disturbed."

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.

A helicopter crashed in the northern Indian state of Uttarakhand on Sunday, killing seven people on board. Local officials said the aircraft was flying from the town of Kedarnath to Guptkashi, which is a prominent Hindu pilgrimage site in the Himalayas.

Relatives of people feared dead or missing after last week’s crash of an Air India Boeing Co. 787 jet have become frustrated by a lack of information about the cause of the disaster and slow-moving recovery operations.

Investigators have recovered the cockpit voice recorder (CVR) from the crashed Air India flight, a key step in uncovering what caused last week's deadly accident. The London-bound Air India aircraft,