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.
Plain English
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.
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 errors or loss of situational awareness if not addressed by rest.
Grounding Statement
A normal task done wrong can be an early signal that tiredness is affecting performance.
Intuition Check
This does not automatically mean the person lacks skill. In this context, it means fatigue may be causing a normally reliable person to miss or mishandle basic steps.
Example Sentence 1
The instructor noted that the student had begun forgetting the carb heat check and skipping radio calls, classic missed or erroneous performance of routine procedures pointing to fatigue.
Example Sentence 2
After eight hours of flying, the pilot exhibited missed or erroneous performance of routine procedures by misreading the fuel gauges during cruise.