The deadly crash of Air India Flight 171 last week has centered renewed scrutiny on the airplane's manufacturer, Boeing, and 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.

Air India Flight 171: what we know so far about the tragic plane crash, 24 hours after the tragedy unfolded in Ahmedabad.

While the official investigation is ongoing, preliminary video footage and expert reviews have highlighted several main theories.