190-00820-08 Rev. A
Cirrus Perspective
™
by Garmin – Pilot’s Guide for the SR20/SR22/SR22T
29
SYSTEM OVERVIEW
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL
FEA
TURES
APPENDICES
INDEX
In the event of a display failure, the system automatically switches to reversionary (backup) mode. In
Reversionary Mode, all essential flight information from the PFD is combined with the EIS and presented on
the display operating in Reversionary Mode. EIS operation while in Reversionary Mode is discussed in the EIS
Section. As when the PFD is operating normally, windows for flight planning, nearest airports, and procedures
are available. The Inset Map is moved to the right side of the display.
If a display fails, the appropriate IAU-display Ethernet interface is cut off. Thus, the IAU can no longer
communicate with the remaining display (refer to Figure 1-1), and the NAV and COM functions provided to
the failed display by the IAU are flagged as invalid on the remaining display. The system reverts to backup
paths for the AHRS, ADC, Engine/Airframe Unit, and Transponder, as required. The change to backup paths is
completely automated for all LRUs and no pilot action is required.
If the system fails to detect a display problem, Reversionary Mode may be manually activated by pressing the
red
DISPLAY BACKUP
Button. Pressing this button again deactivates Reversionary Mode.
DISPLAY BACKUP
Button
Manually Activates/Deactivates
Reversionary Mode on Both Displays
Figure 1-20 Reversionary Mode (Failed PFD)
NAV1 and COM1 (provided by the
failed PFD) Flagged Invalid
NOTE:
The system alerts the pilot when backup paths are utilized by the LRUs. Refer to the Appendices for
further information regarding system-specific alerts.
Summary of Contents for Cirrus Perspective SR20
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