It's supposedly the world's most advanced passenger jet. An ultra lightweight structure with a range of 18 hours. But Boeing's Dreamliner 787 has been grounded since January due to unresolved battery problems. Despite not flying though, it's still doing business. British Airways parent IAG has just sealed a deal for 18 new Dreamliners. That's on top of the 24 it's already ordered to help replace its current long haul fleet of 747-400s.