Garmin G500 Pilot's Manual page 24

AHRS Inputs
GPS Magnetometer
Available Available
Available Unavailable
Available Unavailable
Unavailable Available
Unavailable Available
Unavailable Unavailable
AHRS Normal
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.
1-8
Air Data
— Normal
Available No Mag
Unavailable No Air/
No Mag
Available No GPS
Unavailable
—
Table 1-1 AHRS Operation
Heading AHRS No-GPS
Invalid
Figure 1-12 AHRS Operation
Garmin G500 Pilot's Guide
AHRS AHRS Outputs
Mode
Attitude
Available
Available
Available
Available
Fail Unavailable Unavailable
Fail Unavailable Unavailable
Mode
Heading
Available
GPS Track
GPS Track
Available
Altitude/Heading
Invalid
190-01102-02 Rev. E