Garmin G500, Instructions Manual

Page: 314 / 334

AFMS, GARMIN G500/G600 SYSTEM 190-00601-01 Rev. L
FAA APPROVED Page 32 of 52
3.2 Abnormal Procedures
3.2.1 Heading Failure
Heading failure is indicated by replacement of the digital heading display with
amber “HDG” text and a red X.
If valid GPS ground track is available, it will automatically be displayed in place
of heading. The HSI heading bug and course pointer will continue to function
normally, using GPS ground track as a reference instead of magnetic heading.
If GPS track is not available:
1. Use standby compass for heading reference.
2. Verify selected course using “CRS” button and PFD knob.
CAUTION
No directional references will be displayed on HSI. The
heading bug will be removed, and the course pointer will
remain fixed at the top of the HSI regardless of aircraft
heading. Course deviation indications will behave similar to a
traditional CDI. VOR deviations will be relative the selected
course with a TO/FROM indication. Localizer deviations will
not be affected by the selected course, and reverse sensing will
occur when tracking inbound on a localizer back course.