The outlook for Boeing to earn copious cash flow is bright. It just turned free-cash-flow positive in the second quarter after years of losses, and the company already has its sights on cash earnings of $10 billion a year. This is driven almost entirely by a rebound of commercial aircraft production. In two years as Boeing’s CEO, Kelly Ortberg has righted the ship on the manufacturing chaos that had caused the plane-maker to run shadow factories and struggle with quality.