PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
3-7
Electronic Display System (EDS)
REVERSIONARY CONTROLLERS AND DIMMING
PANEL
System Reversionary Panel
If an attitude and heading reference system (AHRS) or micro air data
computer (MADC) fails, the system can be reconfigured to display the
remaining good sensor on both sides of the cockpit. The remaining
good sensor is selected using the AHRS or air data computer (ADC)
switches on the reversionary controller shown in figure 3--3. A failure of
a PFD unit is controlled by using the on--side display reversionary
panel. Both are described below.
MFD
ADC
NORM
EICAS
PFD
AHRS
SG
AD--50892--R1@
System Reversionary Panel
Figure 3--3
D
MFD Knob
-- This knob selects the on--side MFD display between
PFD, NORM (normal), or EICAS.
NOTES:
1. When the selection is PFD or EICAS, the normal
display unit for the PFD or EICAS is blanked.
2. When the SG reversionary switch is selected
cross--side, the MFD switch operates normally.
However, under this condition, the selection displays
the cross--side PFD or cross--side SG supplied
EICAS on the MFD display tube.
D
ADC Button
-- This button selects between NORM, or cross--side
MADC to supply the on--side PFD/MFD.
NOTES:
1. If reversionary ADC is selected, the current
airspeed modes are dropped, but they can be
re--engaged.
2. It is possible for both pilots to select ADC
reversionary. In that case, each pilot is receiving air
data information from the cross--side MADC.