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.

HONG KONG (AP) — An Air India flight returned to Hong Kong on Monday shortly after takeoff due to a midair technical issue, days after another of the airline’s flights crashed and killed at least 270 people.

A veteran commercial airline pilot said he may have found a “total game-changer” in what led to the doomed Air India Boeing 787 to crash after analyzing new video.

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.

Three days after the crash, only 35 bodies had been handed over to relatives from an overall official death toll of 270.

The Air India flight fell from the sky on Thursday and killed at least 270 people in Gujarat state, officials said Saturday.