Definition
An electronic computer in a fly-by-wire or automated flight control system that receives inputs from the pilot's controls and from aircraft sensors, processes them according to programmed control laws, and sends commands to the flight control surface actuators (ailerons, elevators, rudder, spoilers, etc.) to move the surfaces accordingly.
Plain English
A computer that sits between the pilot's controls and the aircraft's moving surfaces. When the pilot moves the stick or yoke, the signal goes to this computer first, which then tells the surfaces how to move.
Context Anchor
Seen in aircraft systems descriptions, cockpit alert messages, maintenance troubleshooting, and discussions of electronic or fly-by-wire flight controls.
Derivation
“Flight control” refers to controlling the airplane’s movement in flight. “Computer” originally meant something that calculates; in this term, it means an electronic unit that calculates control commands for the airplane.
Why Pilots Care
It handles the constant small corrections needed for stable flight, reducing pilot workload and improving precision on long flights or in challenging conditions.
Intuition Check
Do not think of this as a laptop or general cockpit computer. A flight control computer is a dedicated aircraft unit whose job is to help command the flight controls.
Example Sentence 1
When the captain moved the sidestick, the flight control computer translated the input into commands for the elevator and ailerons.
Example Sentence 2
When the heading changed, the flight control computer commanded a smooth turn using the rudder and ailerons.