A focus on the Boeing 787’s fuel switches in a preliminary assessment raised questions about the pilots’ actions, but much is still unknown about Flight 171.

Investigators have made a chilling discovery in the preliminary investigation into the Air India Flight 171 crash which killed 260 people in June. Just seconds after take-off, both of the 12-year-old Boeing 787 Dreamliner's fuel-control switches abruptly moved to the "cut-off" position,

NEW DELHI (Reuters) -Investigators probing a deadly Air India crash said in a preliminary report that the aircraft's engine fuel switches were flipped to an off position briefly, leading to confusion in the cockpit and putting focus on the pilots flying the Boeing 787.