Garmin CIRRUS PERSPECTIVE SR22T Reference Manual page 123

When no pilot interaction is detected for an additional 60 seconds, the Caution
Annunciation 'HYPOXIA ALERT' is displayed. Again, selecting the ALERT Softkey
will acknowledge the message and reset the system. Pressing any other softkey, or
turning a knob will also reset the system.
When no pilot interaction is detected for an additional 60 seconds, the Warning
Annunciation 'AUTO DESCENT' is displayed in the Annunciation Window and
'Automatic descent to 14,000FT in 60 seconds' is displayed in the Alerts Window.
Once again, selecting the ALERT Softkey will acknowledge the message and reset the
system. Pressing any other softkey, or turning a knob will also reset the system.
When no interaction is detected for another 60 seconds, the system will automatically
proceed with the descent.
As the system prepares for descent, the Selected Altitude is set to 14,000 and
the AFCS enters Indicated Airspeed (IAS) mode with the airspeed reference set to
the maximum allowable airspeed setting for the specific aircraft model. Refer to the
Flight Director Vertical Modes in the AFCS section. AFCS lateral mode settings are
not affected.
As the descent begins, an 'AUTO DESCENT' warning is displayed in the Annunciation
Window. 'AUTO DESCENT - Aircraft Descending to 14,000FT' is displayed in the
Alerts Window. 'EDM' is shown as an AFCS Status Annunciation indicating the system
has entered Automatic Descent Mode. 'EDM' (Emergency Descent Mode) is the AFCS
mode that is activated when Hypoxia Recognition initiates an automatic descent.
A continuous repeating chime will be heard as long as Automatic Descent Mode is
active. After the descent begins, Automatic Descent Mode can only be canceled by
disconnecting the autopilot.
As the aircraft reaches 14,000 feet the system sets the AFCS to Altitude Hold
mode. The AFCS will also remain in Automatic Descent Mode as indicated by 'EDM'
continuing to be displayed as an AFCS Status Annunciation. The system again begins
monitoring for pilot interaction.
If no pilot interaction is detected for four minutes, the system initiates the second
descent. As the system prepares for this descent, the Selected Altitude is set to 12,500
and the AFCS again enters IAS mode with the airspeed reference set to the maximum
allowable airspeed for the specific aircraft model.
As the descent begins, an 'AUTO DESCENT' warning is displayed in the
Annunciation Window. 'AUTO DESCENT - Aircraft Descending to 12,500FT' is
displayed in the Alerts Window. 'EDM' is shown as an AFCS Status Annunciation.
Also, the continuous repeating chime is heard.
190-00821-09 Rev. A
Cirrus Perspective ™ by Garmin – Cockpit Reference Guide for the SR20/SR22/SR22T
Additional Features
105