Demand for the industry’s workhorse A320 and 737 jets has surged in recent years, as economic growth led by Asia brought tens of millions of new middle-class travellers into the skies​Demand for the industry’s workhorse A320 and 737 jets has surged in recent years, as economic growth led by Asia brought tens of millions of new middle-class travellers into the skies ​Latest News [ SOBAN NEWS: International and National ]