FAA Administrator Bryan Bedford said Thursday that the June crash of an Air India flight that killed 260 people does not appear to have been caused by a mechanical problem with the aircraft's fuel control switches, which have emerged as a major focus in the Indian government's investigation into the disaster.

India’s Aircraft Accident Investigation bureau has released a preliminary report on the Air India flight that crashed in June, showing the fuel to the engines was cut off.

A black box recording suggested one of the pilots cut the plane’s fuel flow. PEOPLE spoke to aviation expert Anthony Brickhouse about what that means