A preliminary report released last week included detail about the fuel, saying that the fuel to the plane's engines appeared to have been shut off.

According to the Wall Street Journal, sources close to the US side of the investigation have said the voice cockpit recording suggests Sabharwal turned off the switches, one after the other, exactly a

The deadly Air India crash last month has renewed a decades-old debate in the aviation industry over installing video cameras monitoring airline pilot actions to complement the cockpit voice and flight data recorders already used by accident investigators.