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.

The preliminary investigation released by India's Aircraft Accident Investigation Bureau (AAIB) on Saturday depicted confusion in the cockpit shortly before the crash of the Boeing Dreamliner

The aircraft accident investigation bureau has formed a team to investigate the Ahmedabad plane crash. The crash resulted in 260 deaths. The panel has already submitted a preliminary report. The report indicates a fuel control switch issue and a MAYDAY call shortly after takeoff.