What we know about the fuel switches on Air India flight 171

A preliminary report on the Airlines accident found in June that both fuel control keys were in the cutting of the plane moments before the plane crashed in Ahmedabad.

The sound of the detailed cockpit in the report indicates confusion about the keys between the pilots in the moments before the accident.

How can fuel keys do and what role they may play in the fate of flight 171? Our international trade correspondent explains

This video was updated to include additional information from the report.