
Garmin G1000 Cockpit Reference Guide for the Piper PA-44-180 Seminole
190-01462-01 Rev. A 75
Abnormal Operation
Flight
Instruments EIS
Nav/Com/
XPDR/Audio AFCS GPS Nav
Flight
Planning Procedures
Hazard
Avoidance
Additional
Features
Abnormal
Operation
Annun/
Alerts Appendix Index
ABNORMAL OPERATION
REVERSIONARY MODE
In reversionary mode, critical flight instrumentation is combined with engine
instrumentation on the remaining displays.
When a system detected failure occurs, the display reversionary modes are as
follows:
• PFD failure – MFD does not automatically enter reversionary mode,
reversionary mode must be activated manually.
• MFD failure – PFD automatically enters reversionary mode.
• Reversionary display mode can be manually activated by pressing the
DISPLAY BACKUP Button on the audio panel. When the DISPLAY
BACKUP Button is selected both displays enter reversionay display mode.
NOTE: The PA-44-180 Seminole Pilot’s Operating Handbook (POH) always
takes precedence over the information found in this section.
ABNORMAL COM OPERATION
When a COM tuning failure is detected by the system, the emergency frequency
(121.500 MHz) is automatically loaded into the active frequency field of the COM
radio for which the tuning failure was detected. In the event of a failure of both PFD
and MFD, the emergency frequency (121.500 MHz) automatically becomes the active
frequency on both COM radios.
HAZARD DISPLAYS WITH LOSS OF GPS POSITION
If GPS position is lost, or becomes invalid, selected hazards being displayed on the
Navigation Map Page are removed until GPS position is again established.
Loss of Hazard Functions with Loss of GPS
Position
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