Ahmedabad: Investigators in India on Sunday recovered the second black box from the London-bound Air India Boeing 787 that crashed in the city of Ahmedabad, killing at least 279 people, said PK Mishra, Principal Secretary to Prime Minister Narendra Modi, in an official statement.

The cockpit voice recorder has been found, PK Mishra, a senior aide to Prime Minister Narendra Modi, said in a statement. The flight data recorder was recovered on Friday, one day after the crash.

Only one passenger survived among the 242 travellers and crew on board the Air India jet when it crashed Thursday into a residential area of Ahmedabad, killing at least 38 people on the ground.

Significance of the second black box: The recovery of the second black box from the site would aid the investigators in retrieving a second-by-second reconstruction of events leading up to the crash on Thursday. 

It will capture cockpit audio, including pilot conversations, radio transmissions, warning alarms, and ambient mechanical sounds, catalysing the investigation process and finding the reason behind the deadly aviation catastrophe. 

"The AAIB has launched a detailed investigation, and the US National Transportation Safety Board (NTSB) is conducting a parallel probe under international protocols since the aircraft is American-made," Mishra said in a statement. "Officials confirmed that the Flight Data Recorder (FDR) and Cockpit Voice Recorder (CVR) have been located and secured." Multiple experts have said it is too soon to say why the jet crashed shortly after takeoff.