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Table 7-2 Flight Director Vertical Modes
190-00494-02 Rev. B Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 371
Automatic utomatic utomatic Flight Control System ystem
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS EICAS AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE AFCS ADDITIONAL
FEATURES APPENDICES INDEX
Pitch Hold Mode (PIT)
When the flight director is activated (the FD Key is pressed) or switched (the XFR Key is pressed), Pitch Hold Mode is selected by default. Pitch Hold Mode is indicated as the active vertical mode by the ‘PIT’ annunciation. This mode may be used for climb or descent to the Selected Altitude (shown above the Altimeter), since Selected Altitude Capture Mode is automatically armed when Pitch Hold Mode is activated.
In Pitch Hold Mode, the flight director maintains a constant pitch attitude, the pitch reference. The pitch reference is set to the aircraft pitch attitude at the moment of mode selection. If the aircraft pitch attitude exceeds the flight director pitch command limitations, the flight director commands a pitch angle equal to the nose-up/down limit.
Changing the Pitch Reference
When operating in Pitch Hold Mode, the pitch reference can be adjusted by:
• Using the NOSE UP/DN Wheel
• Pressing the CWS Button, hand-flying the aircraft to establish a new pitch reference, then releasing the CWS Button
Figure 7-7 Pitch Hold ModeSelected AltitudePitch Hold Mode ActiveSelected Altitude Capture Mode ArmedCommand Bars Maintain Desired Pitch Reference
372 Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 190-00494-02 Rev. B
Automatic utomatic utomatic Flight Control System ystem
SYSTEM
OVERVIEW
FLIGHT
AUDIO PANEL EICAS INSTRUMENTS
& CNS
FLIGHT
MANAGEMENT
HAZARD
ADDITIONAL AFCS AVOIDANCE
INDEX APPENDICES FEATURES
Selected Altitudeltitude Capture Mode (ALTS)
Selected Altitude Capture Mode is automatically armed with activation of the following modes:
• Pitch Hold• Vertical Speed• Flight Level Change• Go Around• Vertical Path Tracking (if the Selected Altitude is to be captured instead of the VNV Target Altitude)
The white ‘ALTS’ annunciation indicates Selected Altitude Capture Mode is armed (see Figure 7-7 for example). The ALT SEL Knob is used to set the Selected Altitude (shown above the Altimeter) until Selected Altitude Capture Mode becomes active.
As the aircraft nears the Selected Altitude, the flight director automatically transitions to Selected Altitude Capture Mode with Altitude Hold Mode armed (Figure 7-8). This automatic transition is indicated by the green ‘ALTS’ annunciation flashing for up to 10 seconds and the appearance of the white ‘ALT’ annunciation. The Selected Altitude is shown as the Altitude Reference beside the ‘ALTS’ annunciation.
At 50 feet from the Selected Altitude, the flight director automatically transitions from Selected Altitude Capture to Altitude Hold Mode and holds the Selected Altitude (shown as the Altitude Reference). As Altitude Hold Mode becomes active, the white ‘ALT’ annunciation moves to the active vertical mode field and flashes green for 10 seconds to indicate the automatic transition.
Figure 7-8 Automatic Mode Transitions During Altitude CaptureFlash up to 10 sec, Indicating Automatic TransitionAltitude Reference (in this case, equal to Selected Altitude)
Changing the Selected Altitudeltitude NOTE: Pressing the CWS Button while in Selected Altitude Capture Mode does not cancel the mode.
Use of the ALT SEL Knob to change the Selected Altitude while Selected Altitude Capture Mode is active causes the flight director to revert to Pitch Hold Mode with Selected Altitude Capture Mode armed for the new Selected Altitude.
190-00494-02 Rev. B Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 373
Automatic utomatic utomatic Flight Control System ystem
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS EICAS AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE AFCS ADDITIONAL
FEATURES APPENDICES INDEX
Altitudeltitude Hold Mode (ALT)
Altitude Hold Mode can be activated by pressing the ALT Key; the flight director maintains the current aircraft altitude (to the nearest 10 feet) as the Altitude Reference. The flight director’s Altitude Reference, shown in the AFCS Status Box, is independent of the Selected Altitude, displayed above the Altimeter. Altitude Hold Mode active is indicated by a green ‘ALT’ annunciation in the AFCS Status Box.
Altitude Hold Mode is automatically armed when the flight director is in Selected Altitude Capture Mode (see Figure 7-7). Selected Altitude Capture Mode automatically transitions to Altitude Hold Mode when the altitude error is less than 50 feet. In this case, the Selected Altitude becomes the flight director’s Altitude Reference.
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Cessna Citation Mustang Pilot’Guide 2(31)
