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1500
180
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6
4
1000
80
20
AP1
GX_02_041
ROL AP1 GA
TOGA
Button
For Training Purposes Only
Sept 04
2-39
P I LOT T R A I N I N G GU I D E
AUTOMATIC FLIGHT CONTROL SYSTEM
Vertical GA mode generates a fixed pitch attitude of 10°, based on power being
developed by the engines.
The autothrottle will provide full takeoff thrust until GA mode is cleared.
GA mode can be cleared by selecting the AP on (PIT), or by selecting another vertical
mode.
WINDSHEAR GUIDANCE (WSHR) MODE
Windshear provides for detection of windshear conditions and escape guidance during
approach and takeoff phases of flight.
WSHR mode can be activated by either depressing the throttle-mounted TOGA
button, or advancing the thrust levers towards takeoff, when a windshear warning has
been displayed on EFIS.
WSHR mode will provide vertical guidance in accordance with optimal windshear
escape profile. The airplane will not be commanded to descend unless the airplane is
encroaching on the stall speed safety margin.
Lateral guidance will maintain wings level.
For an increasing performance shear (updraft/headwind), an amber “WINDSHEAR”
caution message will be displayed on the PFD. The WSHR guidance mode cannot be
activated when the caution message is displayed.
20 20
10 10
ROL ALT 200 3000
1500
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6
4
1000
80
20
10 10
AP1
GX_02_042
WIND
SHEAR
P I LOT T R A I N I N G GU I D E
AUTOMATIC FLIGHT CONTROL SYSTEM
2-40 For Training Purposes Only
Sept 04
For a decreasing performance shear (downdraft/tailwind), a red “WINDSHEAR”
warning message will be displayed on the PFD. When WSHR mode is active, the
flight director lateral and vertical modes will be deactivated and replaced by the
“ROL” lateral mode and the “WSHR” vertical mode. The WSHR guidance mode will
be accompanied by an aural warning and will automatically disconnect the autopilot.
WSHR mode cannot be canceled when a Windshear Warning is present.
When the WSHR mode is activated, the attitude at which the aircraft will reach stall
speed is indicated on both PFDs by the Pitch Limit Indicator (PLI). The PLI is
removed from each PFD when the WSHR FD mode is disengaged.
NOTE
Windshear mode is currently disabled via an IAC configuration
module strap. Demonstration to FAA, Transport Canada and
JAA need to occur prior to certification.
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ROL WHSR 200 3000
1500
180
170
160
150
140
145
6
4
1000
80
20
10 10
AP1
WIND
SHEAR
GX_02_043
“Windshear TOGA Button
Windshear”
Pitch Limit Indicator
ROL AP1 WHSR
For Training Purposes Only
Sept 04
2-41
P I LOT T R A I N I N G GU I D E
AUTOMATIC FLIGHT CONTROL SYSTEM
AUTOMATIC EMERGENCY DESCENT MODE
The “Cabin Altitude” aural warning is enunciated when cabin altitude exceeds 9000
feet. The EDM mode is automatically entered anytime the following criteria is met:
• The autopilot is engaged
• The airplane pressure altitude is above 25,000 feet
• The cabin altitude exceeds 14,500 feet
Once the above conditions are met, then:
• The aural warning “Emergency Descent” is enunciated
• An EMERGENCY DESCENT red CAS message is annunciated
• EDM is displayed in red in the PFDs vertical flight director mode area. HDG is
displayed in green as the lateral flight director mode
• The ALT preselector is automatically set to 15,000 feet or 4500 meters
• The HDG bug is automatically set to 90 degrees left of current heading
• The IAS/Mach digital readout displayed on the PFDs is displayed in red
• The selected airspeed bug is the manual speed bug
• The manual speed bug is placed at a position corresponding to the airspeed target
and displayed in red while EDM is active
• The speed target is not manually selectable through the speed knob on the
guidance panel while EDM is active. Changing the FMS/MAN switch position of
the speed knob on the guidance panel has no effect while EDM is active. The FMS
speed bug is indicated by a magenta, triangular symbol, displayed on the outside of
the airspeed tape
• The HDG bug and ALT preselector are changeable by the flight crew while in the
emergency descent mode
• The airspeed target continuously synchronizes to Vmo -10. The selected IAS/
　
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