A Multifunction Display (MFD) is a key component of an Electronic Flight Instrument System (EFIS), often referred to as the “glass cockpit” found in today’s aircraft. The MFD serves various purposes, primarily displaying navigational data like moving charts, but it can also present system status and other vital information.
In most EFIS setups, both the pilot and copilot have their own dedicated Primary Flight Display (PFD) and MFD on their panels. Typically, the central part of the main panel features an Engine Indicating and Crew Alerting System (EICAS) screen. During regular operations, the PFD shows essential flight parameters, including aircraft attitude, altitude, speed, and vertical velocity. Meanwhile, the MFD is generally used for navigation but can also show a range of additional data via pushbuttons, touchscreens, or cursors.
Most MFD installations feature synoptic pages that provide insights into various systems, such as electrical, hydraulic, pressurization, and environmental controls. Additionally, the MFD can act as a backup for the PFD and EICAS screens. For instance, if the PFD fails, the MFD can switch to display the necessary PFD information. Depending on the aircraft model, this switch can happen automatically or through reversionary switches. Furthermore, many models allow the MFD to display EICAS information if the primary EICAS screen goes down, ensuring pilots have access to crucial data at all times.
