System Foreword

Sec 1

AHRS Normal

Heading

AHRS No-GPS

Altitude/Heading

Operation

Invalid

Mode

Invalid

 

Sec 2

PFD

 

Sec 3

MFD

Sec 4

Hazard

Avoidance

Sec 5

Additional

Features

Sec 6

Annun. & Alerts

 

Sec 7

Symbols

 

Sec 8

Glossary

 

 

Appendix A

 

Appendix B

Index

Figure 1-12 AHRS Operation

Loss of GPS, magnetometer, or air data inputs is communicated to the pilot by message advisory alerts (refer to Section 6 for specific AHRS alert information). Any failure of the internal AHRS inertial sensors results in loss of attitude and heading information (indicated by red “X” flags over the corresponding flight instruments).

A maximum of two GPS inputs are provided to the AHRS. If GPS information from one of the inputs fails, the AHRS uses the remaining GPS input and an alert message is issued to inform the pilot. If both GPS inputs fail, the AHRS will 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 and GPS Track information is used; however, the heading display on the PFD is flagged as invalid with a red “X,” “TRK” in magenta is annunciated to the right of the Track value, and the Track value color is changed from white to magenta.

NOTE: In this case the magnetic standby compass and GPS ground track can be used to keep the aircraft on the desired heading.

Note that SVT is turned off in “track-based reversionary mode” and must be manually re-enabled when heading is restored. Also, map orientations change from HDG UP to TRACK UP and must be manually changed back after heading is restored.

When heading fails the heading bug is not removed and the GDU continues driving the autopilot heading error output using track in place of heading.

1-8

Garmin G600 Pilot’s Guide

190-00601-02 Rev. E

Page 24
Image 24
Garmin G600 manual Ahrs Operation