It could take months to fully understand what went wrong in the crash, the first involving a Dreamliner. Officials from India continued the investigation Friday.

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.

Air India plane crash investigators find the first of the "black boxes" from the Boeing 787-8 that slammed into buildings, killing all but one of the 242 people on board.