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Navigation Source
Indicator
Selected Course Bug
CRS 310
Bearing Source Indicators
Indicates navigation source
selected to obtain bearings.
Lateral Deviation Bar
(Course Deviation Indicator)
Indicates left or right deviation from VOR or LOC
beam.
The CDI is limited to the edge of the course
deviation scale in view. When the lateral
deviation is outside of the field of view, the
CDI is ghosted (drawn with dashed lines).
To/From Indicator
To--points to head side of
selected course bug
From--points to tail side of
selected course bug.
VOR mode:
LOC mode (depending
upon runway length):
#1 Bearing Pointer
#2 Bearing Pointer
24 W
30
3
6
ADF1
ADF2
Bearing Pointers
#1 -- Pilot’s side
#2 -- Copilot’s side
10.0 NM
VOR 1
VOR 1
Course Deviation
Scale
When both ADFs are
tuned to the same
station, the tails of the
bearing pointers tend
to appear merged.
NOTE
Vol. 1 12--70--57
REV 56, Jan 31/03
FLIGHT INSTRUMENTS
Head--Up Guidance System
Flight Crew Operating Manual
CSP A--013
MASTER
Primary Mode --- Navigation/Position Indications
Figure 12---70---24 Sheet 5
AP 10
SYNC
PRI
HDG
ALT
LOC 1
GS
21
1700
M .545
240
220
200
180
160
10.0 NM
190 GS
ADF1
ADF2
0.0 VS
21
30
2 000
100
900
800
00
000
1
The HGS does not display a
back course annunciation.
NOTE
A loss of valid information from
the selected navigation source
will cause the corresponding
navigation data to be removed
and the displayed navigation
source indicator is boxed, as
shown above.
Navigation Source Failure Flags
A loss of valid localizer information from
the selected navigation source will cause
the CDI to be removed and a failure flag,
as shown above is displayed.
A miscompare between the two sources of
localizer deviaiton is indicated by the same
failure flag but the CDI is retained. The
flag flashes for 5 seconds when the
miscompare is first detected and thereafter
remains displayed until the condition is
corrected.
Localizer Failure FLag
LOC 1 LOC 2 LOC
VOR 1 VOR 2
REV 56, Jan 31/03
Vol. 1 12--70--58
FLIGHT INSTRUMENTS
Head--Up Guidance System
Flight Crew Operating Manual MASTER
CSP A--013
Primary Mode --- Flight Path Indications
Figure 12---70---25 Sheet 1
Indicates bank relative to horizon.
10 10
AP 10
SYNC
PRI
HDG
ALT
LOC 1
GS
5 5
24
1700
--5 --5
M .545
240
220
200
180
160
VOR 1
10.0 NM
190 GS
ADF1
ADF2
0.0 VS
21
30
2 000
100
900
800
00
000
1
Centre of symbol indicates actual airplane flight path
(lateral and vertical).
The flight path symbol is limited laterally and vertically
so as not to overlay the indications at the edges of the
display (i.e. airspeed and altitude scales).
The flight path symbol has a masking window which
obscures most other symbols it overlays except:
Guidance cue; TCAS box; and
Runway lines; Windshear message.
Approach status message;
The flight path symbol is removed when an off--side
attitude or heading source is selected.
Flight Path Symbol
Guidance Cue
Provides lateral and vertical attitude guidance with
command inputs from either the flight director (F/D) or
the HGS computer.
Echos F/D commands during Primary (Flight) mode or
F/D approach and landing mode.
Displays HGS commands during Category I, II or III
approach and landing modes.
To track F/D or HGS commands, overlay the flight path
symbol on the guidance cue, using normal pitch, roll and
yaw control inputs.
Display conditions:
During an approach, the F/D guidance
cue is removed at 80 feet AGL unless:
a windshear condition exists; or
during take--off or go--around, when
the TO or GA mode is engaged.
During an AI or an AII approach, the
HGS guidance cue is removed at 80
feet AGL.
During an AIII approach, the HGS
guidance cue is removed at touchdown.
5
5
24
-- Masking
window
Vol. 1 12--70--59
REV 56, Jan 31/03
FLIGHT INSTRUMENTS
Head--Up Guidance System
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