Air India and Boeing are in the midst of significant turnarounds, but knowing the cause of the crash of Flight 171 will take a lengthy investigation.

The trade event is a big draw for the industry every year, as Boeing, Airbus and other aerospace giants host parties, sign deals and show off new aircraft.

India has ordered all Boeing 787s being operated by local carriers to be inspected after an Air India crash killed 270 people this week.The aviation regulator has ordered Air India to conduct additional maintenance checks on its Boeing 787-8/9 aircraft equipped with GEnx engines.