190-00870-02 Rev. A
Garmin G950 Pilot’s Guide for the Pilatus PC-6
9
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
1.4 SYSTEM OPERATION
NOTE:
The G950 system alerts the pilot when backup paths are utilized by the LRUs. Refer to the Appendices
for further information regarding system-specific alerts.
The displays are connected together via a single Ethernet bus for high-speed communication. As shown in
Figure 1-1, each IAU is connected to the on-side display. This section discusses normal and reversionary G950
display operation, AHRS modes, GPS receiver operation, and G950 System Annunciations.
DISPLAY OPERATION
NOTE:
In normal operating mode, backlighting can only be adjusted from the PFD (see Section 1.7). In
reversionary mode, it can be adjusted from the remaining display(s).
In normal operating mode, the PFD presents graphical flight instrumentation (attitude, heading, airspeed,
altitude, vertical speed), replacing the traditional flight instrument cluster (see the Flight Instruments Section
for more information). The MFD normally displays a full-color moving map with navigation information (see
the Flight Management Section), while the left portion of the MFD is dedicated to the Engine Indication System
(see the EIS Section). Both displays offer control for COM and NAV frequency selection.
Figure 1-6 G950 System Normal Operation
In the event of a display failure, the G950 System automatically switches to reversionary (backup) mode. In
reversionary mode, all important flight information is presented on the remaining display(s) in the same format
as in normal operating mode.
•
PFD failure
– MFD enters reversionary mode.
•
MFD failure
– PFD enters reversionary mode.
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.
