SPZ--8000 Digital Integrated Flight Control System
A28--1146--055
REV 2
D--1
Enhanced Ground Proximity Warning System (Optional)
Appendix D
Enhanced Ground Proximity
Warning System (Optional)
The enhanced ground proximity warning system (EGPWS) is a terrain
proximity warning system that combines information from aircraft
navigation equipment, i.e., global positioning system (GPS), IRS, FMS,
radar altimeter, with stored terrain data to give the pilot a radar--like
display of terrain along the flightpath.
The full system and the limited system are two system capabilities for
displaying the EGPWS. The full syst em can display EG PWS on both
EHSIs and the MFD. The limited system can only display EGPWS on
the MFD. In both cases, the “auto pop--up” feature of the EGPWS is
only displayed on the MFD.
NOTE: The checklist display has priority over the EGPWS pop--up
display.
FULL SYSTEM OPERATION
The full system operation is controlled using three cockpit--mounted
toggle switches that control the following:
D Pilot’s EHSI
D Copilot’s EHSI
D MFD.
Terrain Select o n the EHSI Displays
Push the pilot’s or copilot’s EHSI EGPWS (terrain) switch to display
terrain data on the desired EHSI. If the EHSI is in the full or arc mode
when EGPWS is selected, it displays terrain data with the arc compass.
If the EHSI is in the map mode when EGPWS is selected, it displays
terrain data with the map mode. To remove the terrain data from the
EHSI, push the EGPWS switch again, or push the WX button on the
display controller.
Terrain Select on the MFD
Push the MFD EGPWS switch to display terrain data on the MFD. If the
MFD is not in the map mode, it automatically switches to the map mode
when terrain is selected for display. To remove the terrain data from the
MFD, push the MAP/PLAN, WX, NORM, or EMER buttons on the MFD
controller.
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