Instruction Manual

G500H Flight Display System 190-01150-21 Rev. 2
Instructions for Continued Airworthiness Bell 407 Page 13 of 19
Alert Text Cause Solution
GPS2 FPL USED
The GPS1 has failed and GPS2 is
configured and operating.
HDG FAULT
AHRS magnetometer fault has
occurred.
GRS 77H not receiving information from
GMU 44. Verify wiring to GMU 44.
HDG LOST
Heading from the GRS77/ GMU 44
is not valid.
Caused by a local magnetic anomaly. No
action required.
<LRU> SERVICE
Specific LRU should be serviced,
where <LRU> denotes specific
LRU.
Return indicated LRU to Garmin for
service.
MANIFEST
GDU has received product data for
an LRU that should have a manifest
entry, but is not in the manifest.
Ensure the manifest is properly
configured.
The LRU software P/N and version
number in the manifest does not
match the values being reported by
that LRU.
Update the LRU software to match the
manifest
Update the manifest to match the LRU
software
NAV1 FAIL No navigation receiver 1 data.
NAV2 FAIL No navigation receiver 2 data.
SIMULATOR The simulator mode is active.
Ensure P6202-36 is not grounded.
SVT DISABLED - Out of
available terrain region.
Location is beyond region covered
by terrain database.
SVT DISABLED - Terrain DB
resolution too low.
A 30 arc-second terrain database is
being used.
Update the Supplemental Data card with
the 9 arc-second terrain database.
SW MISMATCH
GDU software version strings do not
match.
Verify the correct SW is loaded
TRAFFIC FAIL
The traffic information system has
failed.
The GDU 620 is not receiving traffic
information from the traffic sensor. Verify
wiring between GDU 620 and traffic
sensor.
The GDU 620 is receiving information
from the traffic sensor, but the information
is indicating that the traffic sensor has
failed. Troubleshoot traffic system.
TRK LOST
GPS1 TRK lost. HSI defaulted to
GPS2 TRK.
TRK TRAFFIC
Heading Lost. Traffic is now based
on track.
See HDG errors.
2.7 Removal and Installation Information
If any G500H LRUs are removed and reinstalled or a new unit is installed, verify that the LRU unit power-
up self-test sequence is successfully completed and no failure messages are annunciated on the GDU
620 display.