Add to ORKGAccidents due to adverse aircraft-pilot coupling phenomena in the latest technology aircraft occurred both in the US and in Europe, while other programs had less-well-publicized flight control development problems. These events showed that a robust and affordable solution to the development process of digital flight control systems was not universally available. This Technical Report begins with a review of some examples of flight control problems. They span the history of flight from the time when the practice of flying was preceding theoretical developments up to the recent events. There is a chapter detailing lessons learned from various programs with positive results. The review of problems and lessons learned leads into a chapter detai...