This authorized alert reviews the necessities of the proposed regulations and consists of reminders of the elements of the statutory mandate. The ideas of the Boeing strategy to fly-by-wire digital flight control techniques have been established with the Boeing 777. The design precept adopted is to offer a system that responds equally to a mechanically managed flight control system. Because the B777 system is controlled electronically, it is also able to present flight envelope protection. The digital system operates on two levels – there are four Actuator Control Electronics (ACE) models and 3 Primary Flight Computers (PFC).
There are three major flight control legal guidelines – Normal Law, Alternate Law and Direct Law. Alternate Law is additional subdivided into Alternate Law 1 and Alternate Law 2. The degradation to 1 or the opposite of the Alternate Law choices depends upon the kind of failure.