What is the procedure for non-normal flight deck access?

The procedure for non-normal flight deck access typically involves the use of a deadbolt system. This system enhances security by ensuring that only authorized personnel can enter the flight deck under unusual circumstances. By employing a deadbolt, the crew can maintain secure access to the cockpit, preventing unauthorized entry and ensuring that sensitive operations remain shielded from potential threats or interference.

In a scenario where normal access protocols are disrupted—due to an emergency or security concern—the deadbolt serves as a secondary line of defense, reinforcing the lock mechanisms already in place. This design aims to uphold the integrity of flight operations and safeguard the crew and passengers, allowing for better management of non-normal situations.

While other options may suggest alternative methods for accessing the flight deck, they do not typically align with the standard safety protocols in aviation security, which prioritize the use of robust security measures like a deadbolt to manage access effectively.