For Boeing, the Paris Air Show has been a chance to listen to the industry, one Boeing executive says. "What do they think of us? It doesn’t matter what we think of us.”

The preliminary finding gives investigators a new line of inquiry as they study a crash that killed all but one of the plane’s passengers.

Investors and the wider public are looking for answers after Thursday’s crash of an Air India 787 jet. Both of the plane’s black boxes have been recovered.