Definition
A preflight check in which the pilot moves each flight control through its full range of travel to confirm that all controls operate freely, in the correct direction, and without binding or restriction.
Plain English
Before takeoff, the pilot moves the controls all the way in every direction to make sure nothing is stuck, jammed, or hooked up backwards.
Context Anchor
Used during preflight checks, maintenance inspections, and after any work on the control system.
Derivation
“Control” here means the parts used to direct the aircraft. “Sweep” comes from the idea of moving smoothly across a whole area. In this term, the controls are moved smoothly across their whole range of motion.
Why Pilots Care
Confirms the controls will respond fully when needed and catches binding, obstructions, or rigging problems on the ground.
Intuition Check
Do not read “sweep” as a visual scan or a cleaning step. In a control sweep, the controls are physically moved through their full range.
Example Sentence 1
During the run-up, she performed a control sweep and confirmed the ailerons, elevator, and rudder all moved freely to their stops.
Example Sentence 2
Any stiffness noticed during the control sweep must be investigated before flight.