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Common source is displayed
as ATT 1 or ATT 2, depending
upon the attitude source
selected.
The flight path symbol
is not displayed when the
off--side IRS is selected.
240
220
200
180
AP 10
SYNC
PRI
HDG
ALT
LOC 1
GS
21
1700
M .545
160
VOR 1
10.0 NM
190 GS
ADF1
ADF2
0.0 VS
21
30
2 000
100
900
800
00
000
1
Pitch Attitude Failure
Flag
Roll Attitude
Failure Flag
NOTE
The HGS does not display IRS
alignment messages, whether
on the ground or during flight.
,
The roll scale is
removed if valid roll
data from the
selected attitude
source is lost.
The pitch scale is
removed if valid
pitch data from the
selected attitude
source is lost.
Vertical Speed
Failure Flag
V/S
The vertical speed
scale is removed if
valid vertical speed
data from the
selected attitude
source is lost.
PIT
ROL
Vol. 1 12--70--45
REV 56, Jan 31/03
FLIGHT INSTRUMENTS
Head--Up Guidance System
Flight Crew Operating Manual
CSP A--013
MASTER
Primary Mode --- Heading Indications
Figure 12---70---19 Sheet 1
Selected Heading Bug
(Compass Rose)
Indicates heading
selected at HDG knob on
flight control panel.
When selected heading
is off--scale, bug is
removed and a line is
displayed from the
centre of the compass
rose to selected
heading.
Heading Index
Indicates current
magnetic (or true)
heading when read
against heading scale.
10 10
AP 10
SYNC
PRI
HDG
ALT
LOC 1
GS
5 5
21
1700
--5 --5
M .545
240
220
200
180
160
VOR 1
10.0 NM
190 GS
CRS 240
ADF1
ADF2
HDG 210
0.0 VS
21
30
2 000
100
900
800
00
000
1
21 30
Heading Scale (Compass Rose)
Displayed as a 200--degree
compass rose at the bottom centre
of the field.
Indicates current magnetic (or true)
heading, similar to the PFD.
Labeled with corresponding
of degrees.
Cardinal headings are labeled
with the characters N, S, E and W.
The compass rose is displayed only
during flight, when the HGS is in the
primary mode.
Selected Heading
Readout
Indicates heading
selected at HDG knob
on flight control panel.
Heading Scale (Artificial Horizon)
21
its corresponding value, in tens of degrees.
on the horizon line.
Cardinal headings are labeled with the
characters N, S, E and W.
Displayed and
remains on for 5
seconds, anytime
the heading value is
changed or when
value is off--scale.
REV 56, Jan 31/03
Vol. 1 12--70--46
FLIGHT INSTRUMENTS
Head--Up Guidance System
Flight Crew Operating Manual MASTER
CSP A--013
Primary Mode --- Heading Indications
Figure 12---70---19 Sheet 2
MAG 2
Heading Scale (Compass Rose)
10 10
AP 10
SYNC
PRI
HDG
ALT
LOC 1
GS
5 5
21
1780
--5 --5
M .545
240
220
200
180
160
VOR 1
10.0 NM
190 GS
CRS 240
ADF1
ADF2
0.0 VS
21
30
2 000
100
900
800
00
000
1
21
30
Heading Source
Heading source is annunciated only when
common source is selected.
Heading source characters (TRU) displayed
when true heading is selected from on--side IRS.
Heading source characters (TRU 1 and TRU 2)
displayed when true heading is selected from a
common source.
The flight path symbol is not displayed when the
#2 IRS is selected as the common source.
Heading Failure Flag
A heading failure is indicated by the above
failure flag and heading information
(heading scale on horizon line and heading
scale on compass rose) is removed from
the display.
A miscompare is indicated by the same
failure flag but heading data is retained. The
flag flashes for 5 seconds when the
miscompare is first detected and thereafter
remains displayed until the condition is
corrected.
HDG
Vol. 1 12--70--47
REV 56, Jan 31/03
FLIGHT INSTRUMENTS
Head--Up Guidance System
Flight Crew Operating Manual
　
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