Investigators in India are studying the black boxes of a Boeing 787 Dreamliner after recovering them from the aircraft wreckage to ascertain the cause of last week’s plane crash that left at least 270

Based on images of the Air India crash that killed over 200 people in the western Indian city of Ahmedabad on Thursday, experts predicted a difficult recovery and investigation operation exacerbated by the risks of unstable structures and gas leaks.

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Sumeet Sabharwal, who the Indian government has said had 8,200 flying hours of experience and was also an Air India instructor, was the commanding pilot of flight AI171. His co-pilot was Clive Kunder who had 1,100 hours of experience. Sabharwal's funeral took place in Mumbai on Tuesday.