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190-00498-07 Rev. A
Garmin G1000 Pilot’s Guide for Cessna Nav III
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
565
APPENDIX A
System Annunciation Comment
This annunciation is only seen when the autopilot is engaged. The
annunciation indicates an AHRS monitor has detected an abnormal flight
parameter, possibly caused by strong turbulence. In this case, the situation
should correct itself within a few seconds. If there is an actual failure, a red
“X” soon appears over the Attitude Indicator.
Display system is not receiving airspeed input from air data computer.
Display is not receiving altitude input from the air data computer.
Display is not receiving vertical speed input from the air data computer.
Display is not receiving valid heading input from AHRS.
Different versions of GDU software are installed in the PFD and MFD. This can
also indicate different versions of navigation software are installed in the PFD and
MFD. In some circumstances, a cross-talk error between the PFD and MFD can
cause this annunciation.
‘LOI’ Indicates Loss of Integrity of GPS information. GPS information is either not
present or is invalid for navigation use. ‘DR’ may also be seen indicating that GPS
is in Dead Reckoning Mode. Note that AHRS utilizes GPS inputs during normal
operation. AHRS operation may be degraded if GPS signals are not present (see
AFMS).
Display is not receiving valid transponder information.
Other Various Red X Indications
A red ‘X’ through any other display field, such as engine instrumentation fields,
indicates that the field is not receiving valid data.