Here's a simple, one-step solution to turn Boeing profitable again.Boeing's (BA -0.19%) second-quarter earnings report was a mess -- bad enough that it may have gotten its chief executive officer fired.Boeing missed earnings. It missed sales. It tallied $4.3 billion in negative free cash flow, and it has burned$8.2 billion so far this year. Part of the problem was Boeing's commercial airplanes unit, where deliveries fell 32% year over year in Q2. But Boeing's defense business is in a bad way as well, with ...