Why so much is riding on the 777X, Boeing's newest long-haul plane that is already 5 years late and costing billions

• Boeing's 777X, its largest passenger plane, is five years behind schedule.
• With 481 orders from airlines like Emirates and Singapore, much is riding on the new widebody's success.
• The jet may face more delays amid heightened scrutiny of Boeing's commercial airplane production.

Boeing's 777X is the world's largest passenger plane in production, complete with revolutionary folding wingtips and 10% better fuel efficiency than competitors.