Which date marks the expiration for a third class medical certificate issued to a 51-year-old pilot on May 3?

For a third class medical certificate, the duration of validity depends on the age of the pilot at the time of issuance. A pilot who is 51 years old would have a third class medical certificate that is valid for two years from the date of issuance, provided that the certificate was issued on or after their 50th birthday.

Since the certificate was issued on May 3, the expiration date would be May 31 two years later, as the regulation states that the expiration date of third class medical certificates extends to the last day of the month in which it was issued. Therefore, the correct expiration date for the certificate issued on May 3 is May 31, two years later.

This is why the answer indicating the certificate expiration as May 31, two years later, is accurate.