How should the flight deck door be handled according to Ryanair's security procedures?

The flight deck door should be locked at all times according to Ryanair's security procedures to ensure the highest level of security and safety on board. This measure is crucial as it prevents unauthorized access to the cockpit, protecting both the flight crew and passengers from potential threats. A locked door serves as a physical barrier against any attempts to breach the flight deck, thereby allowing pilots to focus on flying the aircraft without the distraction of security concerns. Additionally, this practice is consistent with aviation security regulations and procedures aimed at safeguarding aircraft from hijacking and other forms of interference. In the context of airline operations, maintaining a secure and controlled environment within the cockpit is essential for ensuring the safety of the flight.