What are the four principles of flight deck entry protocol?

The four principles of flight deck entry protocol are crucial for ensuring safety and security during the boarding process of the flight deck. Each principle plays a specific role in maintaining order and preventing unauthorized access.

Preparation refers to the initial steps taken by crew members to get ready for a flight deck entry, ensuring all necessary checks and balances are in place. Positive Control emphasizes the importance of maintaining authority and clear communication throughout the entry process, minimizing risks associated with unauthorized access.

The mention of "3 Seconds" serves as a reminder for crew members to establish a brief pause before entering the flight deck. This time allows for verification of readiness and ensures that everyone is on the same page before proceeding. Lastly, the repetition of "DOOR" indicates the importance of the physical door as a barrier that must be respected. It emphasizes that the entry should only occur when all conditions are deemed safe.

Overall, these principles collectively work to enhance safety protocols and ensure a structured approach to accessing the flight deck, supporting both operational effectiveness and security.