The sudden movement of engine fuel switches has taken centre stage in the investigation of the Air India Boeing Dreamliner crash that killed 260 people in June, the world's worst aviation disaster in a decade.

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.

International airlines from South Korea and India are preparing to inspect its Boeing fleets following findings from the Air India crash investigation.

India's aircraft accident investigation agency has stressed that it is premature to conclude what caused the Air India Boeing crash that resulted in 260 fatalities. While a report hints at possible pilot error,

Air India has completed the inspection of fuel control switches on Boeing 787 planes with no issues being found, Indian broadcaster NDTV said on Wednesday, citing an official.

Cockpit audio from Air India flight indicates fuel supply may have been cut off by the captain, according to the WSJ. The pilots' body rejected the claim.