Plain English Meaning

The part that actually moves something when you flip a switch or move a lever. It takes power coming in and turns it into push, pull, or rotation that moves a piece of the aircraft.

Full Definition

A mechanical or electromechanical device that converts an input signal or power source — typically hydraulic, pneumatic, or electrical — into physical motion to operate an aircraft component such as a flight control surface, landing gear, flap, or valve.

Context Anchor

Seen in aircraft systems such as landing gear, flaps, flight controls, doors, valves, and other parts that must be moved or positioned.