Boeing should be dreaming up its next clean-sheet jet even if it's a decade away

Boeing should be dreaming up its next clean-sheet jet even if it's a decade away

Aviation analysts say a clean-sheet Boeing narrowbody is a good idea, but the company still needs to finish its current projects.Ellen Banner-Pool/Getty ImagesBoeing dismissed rumors of a 737 replacement, but analysts say a new narrowbody is inevitable.A next-generation plane hinges on securing an engine that is efficient enough to power it.A new plane isn't expected for at least a decade, and Boeing still has a trio of jets to certify.Boeing ha…