What must be confirmed before closing the flight deck door?

Before closing the flight deck door, it is essential to confirm several safety and operational factors to ensure a secure and efficient flight preparation. This includes confirming passenger seating, which ensures that all passengers are properly seated and accounted for. The position of the flight attendants must also be verified, as they play a critical role in cabin safety and are responsible for managing the cabin environment and ensuring that all safety protocols are followed before takeoff. Additionally, a signal from the pilot is necessary to indicate that it is safe to close the door, as it ensures that the cockpit crew is ready for departure without distractions or concerns about cabin readiness.

By confirming all of these elements together, it maintains a comprehensive safety protocol that protects everyone on board and adheres to established aviation practices. This multi-faceted confirmation process ensures that the flight can proceed smoothly while prioritizing safety and efficiency.