Where should the airworthiness certificate be located?

The airworthiness certificate should be located at the cabin or cockpit entrance. This positioning is essential for compliance with aviation regulations, as it ensures that the certificate is easily accessible for inspection by federal aviation authorities or other relevant personnel. Having the airworthiness certificate prominently displayed in this area allows for quick verification of the aircraft's certification status before departure and during routine checks.

Storing the certificate in the cockpit or cabin entrance aligns with safety protocols, facilitating any required inspections without delaying operations. This approach not only promotes safety but also conforms to regulatory standards that mandate its visibility for authorized personnel.

In contrast, keeping the certificate in the cockpit compartment could make it less accessible, while storing it in the pilot’s personal possessions would prevent timely access for inspections. The option concerning real estate documentation shows a misunderstanding, as the airworthiness certificate is not related to property documentation but is specific to the aircraft's operational status.