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,

The data from the recorders can be used to reconstruct the flight's final moments and determine the cause of the incident.

Authorities in Gujarat state said on Tuesday they had identified all but one of 260 bodies recovered following an Air India plane crash earlier this month in the western city of Ahmedabad.