South Korea is preparing to order all airlines in the country that operate Boeing jets to examine the fuel switches at the centre of an investigation into a deadly Air India crash that killed 260 people.

India's aviation regulator has ordered the country's airlines to inspect fuel control switches in Boeing aeroplanes, after their reported involvement in a fatal Air India crash that killed 260 people in June.

Boeing fuel switches are facing renewed global scrutiny after last month’s deadly Air India crash that killed 260 people. A preliminary report revealed the aircraft’s fuel cutoff switches flipped mid-flight.