Fuel control switches for the engines of an Air India flight that crashed last month were moved from the “run” to the “cutoff” position moments before impact, starving both engines of fuel, a preliminary investigation report said early Saturday.

Aviation expert Sanjay Lazar on Sunday said that the preliminary report by the Aircraft Accident Investigation Bureau (AAIB) on the Air India flight 171 crash raises more questions than answers, and expressed that the investigative authority should have made the transcript of cockpit voice recorder (CVR) public.