India's Directorate General of Civil Aviation has ordered Air India to conduct special safety inspections on its Boeing 787 fleet after a deadly crash, focusing on aircraft with GE GenX engines.

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.

The CEO of Air India sought to draw a line under rife speculation around the cause of last month's air disaster in Ahmedebad, saying the preliminary investigation had ruled out a mechanical cause for the crash.

How did both engines shut down seconds after take-off? The key theories explained - Here are the four main theories investigators are now exploring

Downed Air India 787 Had Fuel Supply Cut By Pilot, Investigators Confirm is published in Aerospace Daily & Defense Report, an Aviation Week Intelligence Network (AWIN) Market Briefing and is included with your AWIN membership.