Flight Control Computers
The A319 and A320 incorporate a fly-by-wire flight control system. Flight control computers interpret the pilot’s command and move the flight control surfaces as necessary to achieve the desired response. The flight control computers provide flight envelope protection.
The flight control computers consists of two Elevator Aileron Computers (ELACs), three Spoiler Elevator Computers (SECs), and two Flight Augmentation Computers (FACs).
The flight control computers process sidestick and autopilot inputs according to flight control laws. Other inputs to the Flight Control Computers are from the FMGC, ADIRU, radio altimeters, LGCIU, and accelerometers.
RECONFIGURATION OF FLT CTL LAWS
If multiple system failures occur, the flight control computers will reconfigure to a degraded flight control law. See Reconfiguration of FCL Diagram.