What is the primary concern of a pilot with a history of seizures?

The principal concern for a pilot with a history of seizures is the risk of having a seizure while flying. Such an event can have severe implications not only for the safety of the pilot but also for the passengers and aircraft. A seizure could impair the pilot's ability to control the aircraft, leading to dangerous situations during critical phases of flight, including takeoff and landing.

Regulatory bodies typically require pilots with a history of seizures to demonstrate a significant period of seizure-free living and may impose specific conditions regarding medication management to mitigate this risk. This concern is elevated by the unpredictable nature of seizures and the potential for incapacitation at critical moments during flight.

While other factors, such as adverse weather conditions, medications affecting performance, and turbulence, are important considerations in aviation, they do not compare in urgency to the inherent danger of experiencing a seizure while the pilot is responsible for the safe operation of the aircraft.