New Delhi, July 13 -- The Aircraft Accident Investigation Bureau's (AAIB) preliminary investigation report has deepened the mystery of the Air India Flight 171 crash.

The ministry of civil aviation investigators, who analyzed cockpit voice recordings, have found that the 12-year-old Boeing 787 Dreamliner's fuel control switches transitioned from "RUN" to "CUTOFF" position within one second, causing a sudden power loss, leading to the 12 June accident that claimed 260 lives.

One pilot can be heard asking the other, "Why did you cut off?" To which the other replied, "I did not do so." The final conversation between the pilots suggests either a malfunction or an involuntary action.

Mint explains what transpired in the cockpit of the Londo...