How long is the duration of a First Class Medical certificate for individuals under 40?

A First Class Medical certificate for individuals under 40 years of age is valid for 12 calendar months. This duration is established by the Federal Aviation Administration (FAA) regulations, which categorize medical certificates based on the age of the applicant and the class of the certificate. For a First Class certificate, which is required for airline transport pilots and other advanced roles, the 12-month validity reflects the FAA's focus on ensuring that pilots maintain high medical standards.

The need for regular reevaluation through this duration allows for the monitoring of the individual's health and fitness to fly, which is crucial for aviation safety. After the 12-month period, the pilot must undergo another medical examination to renew the certificate for another year, keeping health considerations at the forefront of aviation practices.