MULTI-FUNCTION DISPLAY SYSTEM
The Multi-function Display (MFD), the center DU-1080 liquid crystal display, serves as the weather
radar indicator. It can be used to display the horizontal navigation situation, or long range (FMS), and
to display electronic checklists. It also provides backup capability to the EFIS systems, with a major
sub-function. If a symbol generator on one side fails the pilot can, through the SG1/NORM/SG2
control on the RI-552, select the opposite side symbol generator to take over the failed display, and
operation of the EFIS in that position will continue as before, with the selected symbol generator
powering all three displays.
The multi-function display system expands on the navigation mapping capability of the EFIS,
especially in conjunction with the flight management system (FMS). The MFD display may be used
independently for navigation and mapping information without disturbing the HSI's, which may be
then used without additional displays which would result in more "clutter" on the PFD HSI. The
weather radar display may be selected independently (by selecting off all of the navigation functions)
or overlaid on the navigation display provided by the flight management system, in order to show the
airplane route with respect to the displayed weather returns.
MULTI-FUNCTION DISPLAY CONTROLLER (MC-800)
The EFIS multifunction display (MFD) controller, located on the center instrument panel, allows
mode selections, and display control. In addition to its navigation, terrain, reversion, and checklist
functions, the MFD control also provides for control of the display of the Traffic Collision Avoidance
System (TCAS).
MFD MODES OF OPERATION
The different modes of operation available to the multi-function display system are discussed below.
The modes are: MAP/PLAN, WX, TCAS, Terrain, Checklist, with Normal and Emergency
Procedures, and backup symbol generator modes for either of the primary flight displays (PFDs).
The enhanced ground proximity warning system (EGPWS) and the Traffic Collision Avoidance
System (TCAS) also operate through displays presented on the multi-function display.
MULTI-FUNCTION DISPLAY CONTROLLER
Figure 3-19
Cessna Citation XLS - Instrumentation & Avionics
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