Ahrs Operation - Garmin Beechcraft A36 Pilot's Manual

Primary Flight Display Failed
If the system fails to detect a display problem, reversionary mode may be manually activated by pressing the
Audio Panel' s red DISPLAY BACKUP button (refer to the Audio Panel section for further details). Pressing this
button again deactivates reversionary mode.
Should the connection between a PFD and the on-side GIA 63/63W become inoperative, the on-side GIA
63/63W can no longer communicate with the remaining PFD (refer to Figure 1-1). As a result, the NAV and
COM functions provided to the failed PFD by the on-side GIA 63/63W are flagged as invalid (red "X") on the
remaining PFD (see Figure 1-12).

AHRS OPERATION

Refer to the Appendices for specific AHRS alert information.
NOTE:
Aggressive maneuvering while AHRS is not operating normally may degrade AHRS accuracy.
NOTE:
In addition to using internal sensors, the GRS 77 AHRS uses GPS information, magnetic field data and air
data to assist in attitude/heading calculations. In normal mode, the AHRS relies upon GPS and magnetic
field measurements. If either of these external measurements is unavailable or invalid, the AHRS uses air
data information for attitude determination. Four AHRS modes of operation are available (see Figure 1-13)
and depend upon the combination of available sensor inputs. Loss of air data, GPS, or magnetometer sensor
inputs is communicated to the pilot by message advisory alerts.
190-00595-01 Rev. B
Audio Panel
Figure 1-10 Reversionary Mode Operation
Pressing the DISPLAY BACKUP
button activates/deactivates
reversionary mode for both the
PFD and the MFD.
Figure 1-11 DISPLAY BACKUP Button
Figure 1-12 Inoperative Input (NAV1 Shown)
Garmin G1000 Pilot's Guide for the Beechcraft A36/G36
SYSTEM OVERVIEW
Multi Function Display
15