The rules around Letters of Deviation Authority are labyrinthine, which helps explain why they are relatively rare. But the problems could be—and should be—corrected through a few regulatory changes. By Roy Beisswenger.
Want to be fresh at the end of a long flight? Experimental-only autopilots beat their certified counterparts. They're usually less expensive, more capable and far more user-serviceable (if you know what you're doing). By Stein Bruch.