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.

Cockpit recordings suggest Air India Flight 171's captain turned off fuel, but India’s AAIB calls the report irresponsible, urging caution in speculations.

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.