CHAPTER 5
REFERENCE GUIDE
EFD1000/500 MAX MFD Pilot’s Guide
Page 5-28
091-00006-002 ()
EFD1000/500 MAX MFD Pilot’s Guide
Page 5-29
091-00006-002 ()
When the GPS sensor providing position information for terrain awareness fails or
becomes invalid, the terrain awareness function fails. The annunciation GPS1, GPS 2
or RSM GPS is displayed in amber on the center left of the display. The TERRAIN FAIL
annunciation is displayed in amber when the GPS position, altitude, heading and GPS
Track data are invalid. In addition, the AGL field, orientation annunciations, and range
display are removed. If the Jeppesen Database is invalid or unavailable, cyan coloring
is used to depict unavailable data in place of the terrain data.
When a GPS source’s position data are invalid or no longer available, an amber
annunciation, GPS1, GPS2, or RSM GPS, is shown to the left of the lower display to
indicate which has failed (
Figure 5-31
). If Basemap features are invalid or unavailable
all features except the flight plan are removed from the display.
Obstructions are displayed on Terrain VIEW within 40 nm of the ownship, as an inverted
colored V symbol relative to ownship altitude
Table 5-9
. When enabled for display,
obstructions are rendered as follows:
Relative Altitude
Obstruction Type
Small Tower
(<1000’ AGL)
Tall Tower
(>1000’ AGL)
Group
Obstructions
At and above
Within 500’ below
500’ to 1000’ below
Table 5-9 Terrian Obstruction Type Coding
NOTE
A safety threshold of 100 feet is applied to the terrain
and obstruction thresholds for all phases of flight,
making the terrain and obstructions appear closer
than computed.
Figure 5-31
Invalid or Failed GPS Annunciations
