Indian investigators said Thursday that they began analyzing data from black boxes recovered from the fatal Air India crash — information that is expected to help answer why the London-bound Boeing 787-8 jetliner carrying 242 passengers and crew members crashed shortly after takeoff from Ahmedabad Sardar Vallabhbhai Patel International Airport earlier this month.

The deadly crash of Air India Flight 171 last week has centered renewed scrutiny on the airplane's manufacturer, Boeing. This time it's the 787 Dreamliner in investigators' sights. The accident, which killed over 270 people, was the first fatal crash for the Dreamliner since the model began flying in 2011.

Captain Kishore Chinta, a former investigator with India's Aircraft Accident Investigation Bureau (AAIB), calls this "the rarest of the rare" crashes - a controlled flight into terrain just 30 seconds after take-off. "To my knowledge, nothing quite like this has ever happened," he told the BBC.