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6.
C.
(6)
(a) NAV Function Key
Selection
- Selection
of the NAV mode
causes
the function
key to be annunciated
along
with
the NAV menu
to
be displayed
on the
DC CRT (Figure 6-13). The NAV mode
function is used to select the active navigation source
displayed on the
PFD.
A
NAV function
key selection
has no
effect
on any of the display
formats.
NAV
source selections
are made using the menu driven line select keys and control
only the on-side displays.
(b) Active Navigation Source Selection - The first four lines of
the left side of this menu are dedicated to selection of the
PFD navigation
source.
Selections
in this mode effect the on-
side displays only. The power-up default in this mode is as
follows:
Pilot
- NAV 1
Copilot
- NAV 2
There
is always
one source
selected
for display.
Alternate
activations
of the
same
line key moves
the box between
the 1
and 2 selections
of the same source.
Selection
of a different
line key moves
the box to the number
1 or 2
source of that
line.
All of the possible
sources
are shown
in Figure 6-13. The DC
must be wired
in the aircraft
to get the MLS,
ILS and LTRK
selections shown on the NAV menu. Although the aircraft may be
wired to show MLS on the NAV menu, the optional TCAS/MLS DC-884
Display Controller, Part No. 7007540-941/942, must be used to
select MLS as the active NAV source. See paragraph 6.C.(15).
(c)
PREVIEW Mode Source Selections - When the PREVIEW line select
key is pushed, the PREVIEW submenu is displayed on
the DC CRT
as
shown in Figure 6-14. The power-up default of this mode is
all sources deselected. The NAV sources on this page are
identical to those on the main NAV menu. Multiple activations
of the same line select key moves the box left to right as
shown:
First
Second
Push
Push
r >
OFF
>1
>2
1
Third Push
22-14-00
Page 182
Apr 15/93
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