Tragedy struck this week when a plane crashed in the city of Ahmedabad just shortly after takeoff, leaving investigators and aviation officials with many questions.

Search crews sifting through the wreckage of the Air India jetliner that crashed last week retrieved the second black box, as they seek to gain more evidence to understand what caused the accident that killed all but one of the 242 people on board.

Air India and the Indian government were looking at issues linked to its engine thrust, flaps, and why the landing gear remained open as the plane took off and then came down.