Authorities released a preliminary report on the Air India crash, following an investigation. The London-bound flight from Ahmedabad crashed minutes into the June 12 flight. Only one passenger of the 242 passengers and flight crew survived.

Preliminary findings into last month’s Air India plane crash suggest the aircraft’s fuel control switches were turned off, causing a loss of engine thrust shortly after takeoff.

A report by the Aircraft Accident Investigation Bureau attributes the Air India flight AI171 crash to a chip malfunction. The crash killed 260 people, and a former pilot suggests the pilots may not be at fault,