Pilot's Guide

190-00552-05 Rev. A
Garmin G1000 Pilot’s Guide for the Cessna Corvalis/Corvalis TT
17
SYSTEM OVERVIEW
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
can continue to provide attitude and heading information to the PFD as long as magnetometer and airspeed
data are available and valid.
If the magnetometer input fails, the AHRS continues to output valid attitude information; however, the
heading output on the PFD is flagged as invalid with a red ‘X’.
Failure of the air data input has no affect on the AHRS output while AHRS is receiving valid GPS information.
Invalid/unavailable airspeed data in addition to GPS failure results in loss of all attitude and heading information.
The AHRS (GRS 77) corrects for shifts and variations in the Earth’s magnetic field by applying the Magnetic
Field Variation Database. The Magnetic Field Variation Database is derived from the International Geomagnetic
Reference Field (IGRF). The IGRF is a mathematical model that describes the Earth’s main magnetic field and
its annual rate of change. The database is updated approximately every five years. See the Appendices for
information on updating the Magnetic Field Variation Database. The system will prompt the pilot on startup
when an update is available. Failure to update this database could lead to erroneous heading information being
displayed to the pilot.
G1000 SYSTEM ANNUNCIATIONS
When an LRU or an LRU function fails, a large red ‘X’ is typically displayed on windows associated with
the failed data (Figure 1-12 displays all possible flags and responsible LRUs). Upon G1000 power-up, certain
instruments remain invalid as equipment begins to initialize. All windows should be operational within one
minute of power-up. If any window remains flagged, the G1000 should be serviced by a Garmin-authorized
repair facility.
NOTE: For a detailed description of all annunciations and alerts, refer to Appendix A. Refer to the Airplane
Flight Manual (AFM) for additional information regarding pilot responses to these annunciations.
Figure 1-12 G1000 System Failure Annunciations
GEA 71 Engine
Airframe Unit
OR
GIA 63/63W
Integrated
Avionics Unit
GTX 33 Transponder OR GIA 63/63W
Integrated Avionics Unit
GDC 74 Air
Data Computer
GIA 63/63W Integrated Avionics Unit
GRS 77 AHRS
OR GMU 44
Magnetometer
GIA 63/63W
Integrated
Avionics Unit
GIA 63/63W
Integrated
Avionics Unit
GDC 74 Air
Data Computer
Database
Mismatch in
PFD and MFD