Plain English Meaning
The pilot starts skipping steps, doing them out of order, or doing them wrong on tasks they usually have no trouble with. It is a clue that tiredness is affecting their performance.
Full Definition
A warning sign of fatigue in which a pilot fails to carry out, or incorrectly carries out, familiar tasks that they would normally perform reliably and accurately — such as standard checklist items, radio calls, or pre-landing flows.
Context Anchor
Seen in fatigue discussions, especially when recognizing early signs that a pilot or instructor may not be performing at their normal level.
Why Pilots Care
Signals accumulating fatigue that can lead to larger or if not addressed by rest.