What is the duration of an airworthiness certificate?

The airworthiness certificate is granted to an aircraft to ensure it meets the necessary safety and operational standards set by aviation authorities. This certificate does not have a specific expiration period, which is why it is considered to be indefinite. As long as the aircraft continues to meet these safety standards through regular inspections, maintenance, and adherence to regulatory requirements, the airworthiness certificate remains valid.

This means that owners and operators must maintain the aircraft properly to keep the certificate active, but they do not need to reapply for or renew the certificate at regular intervals like many other types of certifications or licenses in aviation. This understanding highlights the ongoing responsibility of the aircraft owner to uphold safety and airworthiness throughout the aircraft's operational life.