Garmin G500H Pilot's Manual page 320

Alert Message
AHRS1 GPS
AHRS1/2 SRVC
AHRS1/2 TAS
6-2
Description
• AHRS1/2 not
receiving any GPS
information.
• AHRS1/2 operating
exclusively in no-GPS
reversionary mode.
• AHRS1/2 using
backup GPS source.
• AHRS1/2 not
receiving backup GPS
information.
• Two GPS devices
are configured as
present and AHRS1
is not receiving GPS
data from the backup
(2nd) device.
• AHRS1/2 magnetic-
field model needs
update.
• Appears on ground
only.
• AHRS1/2 not
receiving true
airspeed from ADC.
• Displayed heading
and attitude data is
still valid.
• Additional loss of
GPS data will cause
loss of heading and
attitude data.
Garmin G500H Pilot's Guide
Action
• Verify navigators are on and have
a GPS signal and are not in self-
test mode.
• Check AFMS for limitations.
• Contact your Garmin dealer for
service.
• AHRS magnetic field model should
be upgraded.
• Contact your Garmin dealer for
service.
• Check ADC cable.
• Contact your Garmin dealer for
service.
190-01150-02 Rev. J