What should the engineer do if doors need to be reopened after being closed and locked?

Selecting the Cut-Out position of the ATC Door Mode switch is the appropriate action to take when doors need to be reopened after being closed and locked. This procedure is crucial in ensuring that the doors can be safely reopened without triggering an alarm or engaging the automated systems that govern door management.

Utilizing this specific mode allows the engineer to bypass certain operational safeguards while still maintaining control of the system. It is designed to facilitate a manual intervention in situations where automated controls may hinder necessary actions, such as emergencies or operational requirements.

Understanding the function of the ATC Door Mode switch and its Cut-Out position is essential for engineers, as it showcases the balance between adhering to safety protocols while also providing a means to address practical needs such as safely reopening locked doors when required.