ing information is invalid, the digital display
is replaced with amber dashes, the compass
digits are removed, and a large red “HDG
FAIL” is annunciated between the compass arc
and the airplane symbol (Figure 16-17).
A cursor appears on the NAV page which can
be positioned with the line select keys on each
side of the RMUs. When positioned over the
NAV frequency, ADF frequency or the course
(CRS) that frequency or course can be changed
with the TUNE knob. The NAV1 frequency is
in the upper left corner and the ADF frequency
is in the upper right corner.
A digital display of the selected course is located
in the lower left corner of the display. The se-
lected course digital display box is the default
position for the tuning cursor. If the cursor is not
positioned over the course, it can be placed there
by depressing the adjacent line select key. When
the cursor is over the digital course display, the
course can be changed as desired by rotating the
tuning knobs. The small knob will change the
course in 1 degree increments and the large knob
will change it in 10 degree increments. The
course arrow in the center of the display will vary
as the selected course is changed.
VOR and ADF bearing pointer will be dis-
played on the navigation display when valid
frequencies are selected and being received
(Figure 16-16). The bearing pointer head or tail
will extend beyond the compass rose at the ap-
propriate point when within the 90° arc of the
display. The VOR pointer is a single line with
a circle just aft of the point. The ADF pointer
is double lines with a diamond just aft of the
point. When the head or tail of the selected
pointer is not within the compass arc, an arrow
will appear in the upper left or right portion
of the RMU (below the NAV or ADF tuning
boxes) indicating the direction of the bearing
pointer location. There is a digital readout of
the selected bearing pointer bearing located
just above the VOR or ADF legend on the left
side of the case.
A conventional vertical deviation scale will
appear on the right side of the backup navi-
gation display when a valid ILS frequency is
tuned.
A conventional VOR/ILS lateral deviation
bar or course deviation indicator (CDI) will
appear in the center of the backup navigation
display when a VOR/ILS frequency is tuned
and received.
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
16-24
FOR TRAINING PURPOSES ONLY
FlightSafety
international
Honeywell
TUNE
SQ
DIM
1/2
STO
DME
TST
PGE
ID
N
33
3
330
ADF
CRS
DME
. . .
109.90
. . . .
NAV
ADF
.
. . .
. . .
HDG
FAIL
Figure 16-17. Invalid Backup
Navigation Display on RMU