What is the duration for a third class medical certificate for a pilot over 40?

The duration of a third class medical certificate for a pilot who is over 40 years old is indeed two years. According to FAA regulations, medical certificates are issued based on the age of the pilot at the time of the examination. For pilots over 40, the validity of a third class certificate is set at two years, ensuring that they are subject to more frequent medical assessments due to age-related factors that could impact their fitness to fly.

In contrast, for pilots under 40, a third class medical certificate is valid for five years. The differentiation in validity periods reflects the FAA's approach to maintaining safety in aviation by considering the potential for health-related issues as pilots age.