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thought of as a “Flight Path Director”. It functions in the same way as a
conventional single cue flight director. The object is to center the Guidance
Cue inside the Flight Path circle using pitch and roll inputs. The lines on the
Guidance Cue indicate roll commands.
During an EGPWS Windshear warning, the Guidance Cue becomes solid
and flashes for 10 seconds and then is steady.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-83
Figure 4-40:
Approach Modes Flight Path Symbols
HGS-Derived
Guidance Cue
FCS-Derived Guidance
Cue
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-84 November 2002 9701-1153 Rev A
Glideslope Reference Line: The Glideslope Reference Line is a conformal
display of the glideslope angle entered on the HGS Control Panel (HCP). It
is a series of dashed lines positioned below the Zero-Degree Pitch Line. If a
-3.00 degree angle is entered, then the Glideslope Reference Line is
positioned 3° below the Zero-Degree Pitch Line and centered on the
display. At the outside ends of the Glideslope Reference Line is a number
that shows the selected glideslope angle.
Because the Glideslope Reference Line is a conformal display, positioning
the Flight Path Symbol over the Glideslope Reference Line results in the
aircraft flying a descent angle equal to the selected glideslope angle. During
visual approaches, by overlaying the Glideslope Reference Line on the
runway touchdown zone and then maintaining the Flight Path Symbol on
the Glideslope Reference Line, the selected descent angle is maintained to
the runway.
Flight Path Slip/Skid Indicator: A Flight Path Slip/Skid Indicator is
displayed during a single engine approach or a single engine takeoff or goaround.
This Slip/Skid Indicator moves laterally underneath the Flight Path Symbol
to show lateral acceleration of the aircraft.
IDLE Message: The “IDLE” message is displayed to remind the left-side
pilot to reduce the aircraft thrust to idle for touchdown. The “IDLE”
message is displayed directly below the Radio Altitude symbology.
The “IDLE” message shows in AIII mode only.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-85
Figure 4-41:
Approach Modes Flight Path Symbols
Flight Path
Slip/Skid
Indicator
“IDLE”
Message
Glideslope
Reference
Line
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-86 November 2002 9701-1153 Rev A
Flare Command: At flare initiation height in AIII mode, a Flare Command
is displayed as a “plus” (“+”) symbol positioned approximately 3° below
the Guidance Cue. The Flare Command symbol flashes and rises toward the
Guidance Cue at a rate directly related to the aircraft descent rate until the
Flare Cue embeds itself in the Guidance Cue. The Flare Command then
becomes the Guidance Cue. The left-side pilot follows the Guidance Cue to
perform the flare maneuver through touchdown.
Loss of the AIII flare guidance results in the loss of AIII status and an
approach warning (APCH WARN) message.
The flare command shows in AIII mode only.
Flare Cue: A Flare Cue reminds the left-side pilot to visually flare the
aircraft. The Flare Cue is a pair of plus symbols (“+ +”); one showing on
each side and directly above the wings of the Flight Path symbol. The Flare
Cue flashes as the aircraft descends through 60 feet Radio Altitude, and
continues flashing until the aircraft descends through 30 feet.
NOTE: The Flare Cue is fixed to the Flight Path Symbol and is not
used to command or provide guidance for the flare maneuver.
The Flare Cue shows in AII, AI, F/D, and VMC modes.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-87
Figure 4-42:
Approach Modes Flight Path Symbols
Flare
Command
Flare Cue
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-88 November 2002 9701-1153 Rev A
Approach Modes Rollout Symbol Group
See Figure 4-44 thru Figure 4-43. Table 4-20 gives the Rollout Mode
Symbol Group.
Table 4-20: Approach Modes Rollout Symbol Group
Symbol
AIII
AII
AI
RO
F/D
VMC
Ground Roll Reference ●
Ground Localizer Deviation Scale and
Pointer
●
HGS-Derived Ground Guidance Cue ●
Runway Remaining ●
Deceleration Scale and Pointer1 ● ● ● ● ● ●
Ground Localizer Line2 ● ● ● ●
1 shows only if Deceleration Scale is enabled.
2 shows only if Rollout Mode is not enabled.
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