Definition
Mistakes made by a pilot during the operation of an aircraft that result in unsafe conditions, deviations from procedure, or breakdowns in situational awareness. Common categories include errors in instrument cross-check, instrument interpretation, and aircraft control.
Plain English
Mistakes a pilot makes while actually flying the aircraft — things like misreading an instrument, scanning the panel poorly, or handling the controls incorrectly.
Context Anchor
Seen in instrument flying discussions, especially when reviewing navigation equipment, approach procedures, and common causes of instrument approach mistakes.
Derivation
From Latin operari, meaning 'to work' or 'to do.' An operational error is a mistake made during the doing — that is, while the pilot is actively flying — as opposed to a planning or preflight mistake.
Why Pilots Care
These errors directly affect safety margins and can trigger incidents, violations, or training interventions.
Intuition Check
Operational does not mean “normal” or “routine” here. It means the error comes from how the pilot operates or uses the system.
Example Sentence 1
Fixating on the attitude indicator and ignoring the other instruments is a common operational error during instrument flight.
Example Sentence 2
Review of the flight data showed two operational errors during the missed approach segment.