What is the first step in the normal flight deck access procedure?

The first step in the normal flight deck access procedure involves the designated crew member, often referred to as the NO1, entering the flight deck. This action is critical because it typically signals the beginning of the formal access process. Ensuring that a designated crew member is responsible for this entry helps maintain a structured and secure approach to accessing the flight deck, which is essential for maintaining safety and security protocols.

In this context, the NO1 serves as a point of accountability, ensuring that the entry aligns with specific security measures and operational protocols. This step is foundational because it leads to subsequent actions that further involve crew notifications or security checks before the flight deck can be accessed by other personnel. Understanding this sequence emphasizes the importance of controlled access in aviation environments, where safety is paramount.