What happens when pressing the COMM key on the MCD?

Pressing the COMM key on the MCD (Multi-Function Control Display) is designed to provide pilots with immediate access to the COMM/NAV Summary page. This page displays an overview of the communications and navigation equipment settings, such as frequencies and configurations, which are crucial for flight operations.

Having this information readily available enhances situational awareness for pilots, allowing them to quickly assess and manage radio communications and navigation parameters during various phases of flight. This function is particularly important in dynamic environments where swift decision-making is necessary. The direct access to this summary minimizes the need for navigating through multiple screens, thereby streamlining the pilot's workload.

Other options, such as displaying ground communication settings or activating radio transmitters, do not accurately represent the immediate function of the COMM key. The key specifically leads to the summary page, which consolidates essential data in one view for the pilot's convenience.