Errors made by two Air India pilots before the plane’s fatal crash will reportedly be the focus of an investigation into the tragedy.

All but one of 242 people board the Boeing 787 Dreamliner died when the aircraft plunged into a medical student hostel in a built-up suburb last month, less than a minute after take-off from Ahmedabad airport.

Including those on the ground, 270 people were killed in total.

Preliminary findings by US officials indicate that switches controlling fuel flow to the jet’s two engines were turned off, leading to a loss of thrust at take-off, the Wall Street Journal (WSJ) reported.

The findings could explain why the jet’s emergency-power generator, known as a ram air turbine, appeared to have been activated moments before it plummeted to the ground.