Plain English Meaning

To reset the trim wheel or trim controls so the aircraft holds the new attitude on its own, without the pilot having to keep pushing or pulling on the yoke.

Full Definition

To readjust the aircraft's trim controls to relieve control pressures after a change in airspeed, power setting, configuration, or attitude, so the aircraft maintains the new desired flight condition without continuous pilot input on the controls.

Context Anchor

Used during instrument flying when changing power, leveling off, changing speed, or returning to .