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CAUTION” flashes for 10 seconds and then is steady.
Figure 4-53:
Warning Symbols
NO RO
RO CAUTION
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-106 November 2002 9701-1153 Rev A
“PULL UP”: When the Enhanced Ground Proximity Warning System
issues a Pull up message, “PULL UP” is displayed above the Aircraft
Reference Symbol. It is a higher priority message than the “TERRAIN”
message. This symbol flashes continuously.
“TERRAIN”: When the Enhanced Ground Proximity Warning System
issues a TERRAIN message, “TERRAIN” is displayed above the Aircraft
Reference Symbol. It is a lower priority message than the “PULL UP”
message. This symbol flashes continuously.
Yaw Damper Disengaged: “YD” displayed in the upper left part of the
display indicates the yaw damper is not engaged.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-107
Figure 4-54:
Warning Symbols
TERRAIN
Yaw
Damper
Disengaged
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-108 November 2002 9701-1153 Rev A
Failure Flags
Failure flags are displayed for invalid sensor status. These are generally
indicated by large-character boxed messages of the affected parameters, and
removal of the symbols related to the fault. In some cases, the HGS
removes other related symbols as required.
Table 4-24 lists the sensor status flags that can be displayed by the HGS.
See Figure 4-55 for display locations.
Table 4-24: Sensor Failure Flags
PRI
Flags
Ground
Flight
TO
AIII
AII
AI
RO
F/D
VMC
Pitch1 ● ● ● ● ● ● ● ● ●
Roll1 ● ● ● ● ● ● ● ● ●
Heading1 ● ● ● ● ● ● ● ● ●
Airspeed1 ● ● ● ● ● ● ● ● ●
Altitude1 ● ● ● ● ● ● ● ● ●
Radio Altitude1 ● ● ● ● ● ● ● ● ●
Localizer ● ● ● ● ● ● ● ●
Flight Director1 ● ● ● ● ● ● ● ● ●
Vertical Speed1 ● ● ● ● ● ● ● ● ●
Glideslope ● ● ● ● ● ●
Navigation Source ● ● ● ● ● ● ● ●
Vertical Deviation ● ●
Bearing ●
TCAS Status ● ● ● ● ● ● ● ● ●
1Symbol flashes for 10 seconds when first displayed.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-109
Figure 4-55:
Failure Flag Symbols
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-110 November 2002 9701-1153 Rev A
Miscompare Flags
Miscompare flags are displayed for miscompares between certain similar
parameters. These are indicated by small-character boxed messages of the
affected parameters. The messages flash until the master warn reset is
pushed and then are steady. A miscompare of similar data results in the
display of a flag without removal of the related symbols. In this case, the
flag indicates that the applicable data should be verified by crosschecks
with other cockpit displays.
Table 4-25 lists the sensor miscompare flags that can be displayed by the
HGS. See Figure 4-56 for display locations.
Table 4-25: Sensor Miscompares
PRI
Flags
Ground
Flight
TO
AIII
AII
AI
RO
F/D
VMC
Pitch ● ● ● ● ● ● ● ● ●
Roll ● ● ● ● ● ● ● ● ●
Heading ● ● ● ● ● ● ● ● ●
Altitude ● ● ● ● ● ● ● ● ●
Airspeed ● ● ● ● ● ● ● ●
Localizer ● ● ● ● ● ● ● ●
Glideslope ● ● ● ● ● ● ● ●
Radio Altitude ● ● ● ● ● ● ● ● ●
Aileron Mistrim1 ● ● ● ● ● ● ● ● ●
Elevator Mistrim1 ● ● ● ● ● ● ● ● ●
Rudder Mistrim1 ● ● ● ● ● ● ● ● ●
1Symbols are large size characters, and do not flash
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-111
Figure 4-56:
Miscompare Symbols
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-112 November 2002 9701-1153 Rev A
Non-Conformal Displays
The HGS displays certain symbols in a non-conformal manner depending
on aircraft attitude and HGS mode of operation.
Exclusion Window
Generally, critical flight path symbols have display priority over other
symbols. Such critical symbols will “blank”, that is, “write over” symbols
of lower display priority. The Flight Path Symbol is one of these symbols.
For example, when it moves over the Pitch Scale, it can cause a portion of
the Pitch Scale to be excluded from the display (Figure 4-57). The excluded
part of the Pitch Scale is defined by the size of the invisible rectangular box
　
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