Definition
In aviation instruction, errors are actions or inactions by a pilot or learner that lead to deviations from intentions or expectations. They are typically grouped into two categories: slips, which occur when a person plans the right action but executes it incorrectly, and mistakes, which occur when a person executes the planned action correctly but the plan itself was wrong.
Plain English
Errors are the things a pilot does wrong in the cockpit or in training. Sometimes you knew what to do but your hand did the wrong thing (a slip). Other times you did exactly what you intended, but the intention itself was based on faulty thinking (a mistake).
Context Anchor
Seen in aviation instruction, debriefing, safety discussions, and any situation where a pilot compares what happened with what should have happened.
Derivation
From the Latin 'errare', meaning 'to wander' or 'to stray'. The image is useful: an error is a wandering away from the intended path, whether that wandering happened in the planning or in the doing.
Why Pilots Care
Understanding the difference between slips and mistakes changes how an instructor or pilot fixes them. A slip is fixed by attention, practice, and procedure discipline. A mistake is fixed by better knowledge, better judgment, or a better mental model. Treating one as the other wastes training time and leaves the real cause unaddressed.
Intuition Check
Do not read errors as meaning “bad pilots” or “careless people.” In this context, errors are specific wrong actions, missed actions, or poor judgments that can be identified and corrected.
Example Sentence 1
The instructor reviewed the flight and identified two errors: a slip when the learner reached for the wrong switch, and a mistake when the learner chose the wrong runway based on outdated wind information.
Example Sentence 2
Recognizing common errors early helps prevent small deviations from becoming serious safety issues.