PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
Electronic Flight Instrument System (EFIS)
4-30
D
Vertical Deviation Scale
-- The white vertical deviation scale
appears on the right side of the attitude sphere. The navigation
source for this scale is selected by the DC from any one of the
following sources:
-
ILS glideslope (green pointer)
-
VNAV from the FMS (magenta pointer).
NOTE:
When the cross--side navigation source is selected, or if
both sides are using the same source, the pointer is
shown in yellow.
A white GS is displayed above the vertical deviation scale when the
vertical deviation is supplied by an ILS glideslope, and a white FMS
annunciation is displayed when the vertical deviation is supplied by
an FMS.
When invalid information is present from the ILS glideslope receiver,
the pointer is removed and a red
X
is drawn through the scale. The
scale, label, and pointer are removed for invalid FMS data.
D
Command Bar Display Logic (Normal Mode)
-- Normally,
command bars are displayed on each PFD. The on--side PFD
displays the information for the respective IAC to compute steering
for the command bars. Command bar display can be either
single--cue or cross--pointer.
NOTES:
1. The command bar display (single--cue or
cross--pointer) is selected at the time of installation.
2. If the FD1/FD2 switches are selected, command
bars are normally displayed on both PFDs. They
show guidance that satisfies the flight director
modes selected by the guidance controller.
However, there is one exception. If the pilots do not
have the same navigation source (selected with the
DC) the non--coupled command bars are removed
from the ADI.
3. If both pilots have NAV as the selected navigation
source, but have selected different situations (i.e.,
different courses or different frequencies on the NAV
receiver), both command bars are in view. However,
the flight director mode annunciation of course, arm,
and capture, is only a function of the coupled side.
Futher, the non--coupled side command bars could
capture the selected course and not be in agreement
with the displayed flight director modes that are
supplied by the coupled side.
