Plain English Meaning

The action you take to fix a deviation once you've spotted it on the instruments — typically a small, smooth control input that brings the airplane back to where it should be.

Full Definition

The specific control input a pilot applies to return an instrument indication to its desired value after a deviation has been detected. In the context of altimeter use during straight-and-level flight, the corrective technique is a small, smooth pitch adjustment using the elevator control, accompanied by a trim change as needed, to restore the assigned altitude.

Context Anchor

Seen in instrument flying when the altimeter shows the aircraft away from the altitude is trying to .