Why did you cut off?” one of the pilots asked, as the cockpit voice recorder picked up the bewilderment that would come to characterize the worst air tragedy in a decade. The initial probe of Air India Flight 171’s fatal crash on June 12,

When the fuel control switch has to be cut off, the pilot flying will say, fuel control switch left, confirm. So, after the confirmation is made by the second pilot, the pilot monitoring will cut off (the switch).

A black-box recording of dialogue between the Air India flight's two pilots indicates it was the captain who turned off switches that controlled fuel flowing to the plane's two engines, the Wall Street Journal reported on Wednesday,