For pilots over 40 years old, how long is a first-class medical certificate valid?

For pilots over 40 years old, a first-class medical certificate is valid for six months. This specific duration is established by the Federal Aviation Administration (FAA) regulations, which specify that the validity of medical certificates for first-class privileges changes based on the age of the pilot.

Pilots aged 40 and older need to renew their first-class medical certificate more frequently compared to younger pilots, reflecting the increased risk factors associated with age. This requirement emphasizes the importance of health monitoring in aviation, which is crucial for ensuring safety in flight operations.

In contrast, the other options represent longer validity periods that do not align with the regulations set for older pilots. These shorter durations reinforce the need for regular health assessments to maintain the rigorous standards required for pilots operating under first-class medical conditions.