Specifications

SECTION III
MODEL 560 INSTRUMENTATION AND AVIONICS
MULTIFUNCTION DISPLAY SYSTEM
The Multifunction Display (MFD), the central DU-870 cathode ray tube, serves as the weather radar
indicator. It can be used to display the horizontal navigation situation, either short range (VORTAC) 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 MFD controller, select the opposite side symbol generator to take over the
failed side's display, and operation of the EFIS in that position will continue as before, with the selected
symbol generator powering all three displays.
The multifunction 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 EHSIs, which may be then used without additional
displays which would result in more "clutter" on the EHSI. 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.
MULTIFUNCTION DISPLAY CONTROLLER
The EFIS multifunction display (MFD) controller, located at the front of the pilots’ pedestal, allows
mode selections, display control, and symbol generator reversion control of the pilot’s and copilot’s
systems. In addition to its navigation, reversion, and checklist functions the MFD control also provides for
control of the display of the optional Traffic Collision Avoidance System (TCAS).
MFD MODES OF OPERATION
The different modes of operation available to the multifunction display system are discussed below.
The modes are: MAP/PLAN; WX; Checklist, with Normal and Emergency Procedures; and backup symbol
generator modes for either of the primary flight displays (PFDs). The optional Traffic Collision Avoidance
System (TCAS) also operates through displays presented on the multifunction display. If the TCAS system
is installed, the MFD controller will have an additional (TCAS) button located to the right of the MAP/PLAN
button.
MAP MODE
The MAP function is a partial arc airplane heading up display which is selected by the alternate action
MAP/PLAN push button. The MFD display cycles from MAP to PLAN as the MAP/PLAN button is pressed.
The MAP format allows totally independent use of the MFD display for navigation mapping and allows
increasing the maximum range, beyond normal radar range, on the display which normally serves as the
radar indicator. Power up mode is the MAP mode. To add weather to the display, press the WX button on
the MFD controller.
Figure 3-24. Multifunction Display Controller (MC-800)(Typical)
I 56OMB-01 Configuration AA 3-49