Garmin G900X Pilot's Manual - page 22
Garmin G900X Pilot’s Guide
190-00726-00 Rev. A
1-10
SYSTEM OVERVIEW
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 and CNS Section for further details).
Pressing this button again deactivates reversionary mode.
Figure 1-7 G900X Reversionary Mode (Failed PFD)
DISPLAY BACKUP
Button Manually Activates/
Deactivates Reversionary Mode on Both Displays
NAV1 and COM1 (provided by the
failed PFD) Flagged Invalid
G900X SYSTEM ANNUNCIATIONS
When an LRU or an LRU function fails, a large red ‘X’ is typically displayed over the instrument experiencing
failed data (Figure 1-8 displays all possible flags and responsible LRUs). Upon G900X power-up, certain
instruments remain invalid as equipment begins to initialize. All instruments should be operational within one
minute of power-up. If any instrument remains flagged, the G900X should be serviced by a Garmin-authorized
repair facility.
Figure 1-8 G900X System Failure Annunciations
GDC 74A Air
Data Computer
GTX 33 Transponder
OR
GIA 63W Integrated
Avionics Units
GDC 74A Air
Data Computer
GEA 71 Engine
Airframe Unit
OR
GIA 63W Integrated
Avionics Unit
GIA 63W Integrated
Avionics Units
GRS 77 AHRS
OR
GMU 44
Magnetometer
GIA 63W Integrated
Avionics Units
GIA 63W Integrated
Avionics Units