Air India Flight 171 was airborne for less than 40 seconds before it plunged into a densely-populated neighbourhood in AhmedabadInvestigators now face the grim task of sifting through the wreckage and decoding the cockpit voice and flight data recorders of the Boeing 787 Dreamliner to piece together what went catastrophically wrongAgainst the backdrop of the London-bound plane tragedy,

Investigators have begun analyzing data from the black boxes recovered from the Air India Boeing 787 jet that crashed earlier this month, killing 270 people.