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.

SEOUL (Reuters) -South Korea's transport ministry is preparing to order all airlines in the country that operate Boeing jets to examine fuel switches in accordance with a 2018 advisory from the U.S. Federal Aviation Administration, the ministry's foreign media spokesperson said on Monday.

India on Monday ordered its airlines to examine fuel switches on several Boeing models, while South Korea said it would order a similar measure, as scrutiny intensified of fuel switch locks at the centre of an investigation into a deadly Air India crash.