Fava's job was required by a 2021 legal settlement over fatal 737 MAX crashes. During Wednesday's factory tour, workers could be seen pulling mini trains loaded with parts in front of three lines of unfinished jetliners awaiting paint jobs. Production and delivery delays have curbed Boeing's ability to tap resurgent demand for jets out of the pandemic. "Demand for airplanes is as robust as I've ever seen it. I think it will get more robust," Boeing CEO Dave Calhoun said at a separate event earlier this week. The demand for airplanes "is more than a bubble," he added. (Reporting by Eric M. Johnson in Seattle; Editing by Mark Potter)