BendixKing SG 465 System EFS 40/50 - Manual (Page 144)

EADI Displays
DECISION HEIGHT SET
o
A part time green alphanumer-
ic readout, located in the lower
right corner, displays the letters
DH and selected decision height
in feet as manually established
by the DH set control knob. With
the control pulled out, the DH set
value is displayed and may be
set regardless of aircraft altitude.
With the control knob “in”, DH is
displayed only for radio altimeter
altitude less than 2500 feet AGL.
The DH set display range is from
“OFF” (-1 ft.) to the RA declutter
value (2,500
’ ). Refer to Figure
4 . 2 . 2 .
DECISION HEIGHT ALERT
When the radio altimeter height
is equal to or less than the select-
ed decision height, the D H
annunciator will be displayed.
When first activated, the DH
annunciator will flash for 10 sec-
onds. The DH symbol is a large
yellow “DH” on a black back-
ground enclosed by a yellow box,
located to the right of the pitch
scale and above the horizon line
when in normal attitude. Refer to
Figure 4.2.2.
PRECISION APPROACH
MODE FORMAT
The precision approach mode
display is obtained by selecting
the ILS MLS or GPS navigation
source. (i.e. using the NAV but-
ton) If an ED 462 or 551A is
used as the EADI, the full
sky/ground display is reduced in
size to provide a high contrast
black background for various
scales and annunciations. A ris-
ing runway symbol is provided for
the display of expanded left/right
deviation and runway closure
during the final 200 feet of radio
altimeter height. The rising run-
way center line, referenced to the
lateral deviation scale, will pro-
vide LOC, MLS or GPS devia-
tion. A “LOC”, MLS, or “GPS”
annunciation identifies the sensor
in use. This annunciation is not
provided after 07 software if only
one sensor type is used. A verti-
cal scale is provided to display an
approach glidepath. Refer to
Figure 4.2.2.
EXPANDED LATERAL
DEVIATION SCALE
Located at the bottom center of
the EADI, displayed in white, with
2 hollow circles on standard ADI
display and 4 circles on a com-
posite ADI display and a center
diamond is the expanded lateral
deviation scale. This scale pro-
vides a reference for the rising
runway symbol with ILS, MLS or
GPS selected. As an expanded
scale, it represents 1/2 full scale
deviation as displayed on the
EHSI. When the selected course
and aircraft heading differ by
more than 105 degrees, the
left/right sensitivity is reversed
and a green (onside) or yellow
(offside) BC is displayed left of
the center diamond to alert the
pilot that back course information
is being displayed. Refer to Fig-
4.2.9 Issued 8/10 SW 04/05/06/07/08/09/10/11/12/13/14/15/16
Section 4.2mp 10/13/10 2:54 AM Page 4.2.9