Plain English Meaning
Anything about a pilot's body or mind that could make flying less safe — being sick, tired, dehydrated, stressed, on medication, or affected by altitude.
Full Definition
Health-related conditions and physiological factors that can degrade a pilot's ability to safely operate an aircraft, including illness, medication effects, fatigue, dehydration, stress, hypoxia, and the use of alcohol or drugs.
Context Anchor
Seen in pilot risk management discussions, especially when evaluating whether a pilot is fit to fly before a lesson, solo flight, or cross-country flight.