Garmin G500 Manual page 25

3.1.3 Air Data Computer (ADC) Failure
Air Data Computer failure is indicated by a red X and yellow text over the
airspeed, altimeter, vertical speed, TAS and OAT displays. Some derived
functions, such as true airspeed and wind calculations will also be lost. If valid
GPS data is available, the PFD will automatically revert to display GPS
calculated altitude relative to mean sea level. This GPS altitude is displayed
above the altitude tape.
1. Use Standby Airspeed Indicator and Altimeter
2. Seek VFR conditions or land as soon as practical
If ADC 1 has failed and PFD 1 AIR DATA switch is installed:
PFD 1 AIR DATA switch – Select ADC 2
3.
ALT NO COMP and IAS NO COMP alerts will be present.
3.1.4 Loss of Electrical Power
In the event of a total loss of electrical power, the G500 system will cease to
operate and the pilot must utilize the standby instruments to fly the aircraft.
3.1.5 Loss of Electrical Power to 3-inch Electric Standby Attitude
Indicator (flashing amber STBY PWR light)
When a 3-inch electric standby attitude indicator is installed, loss of primary
electrical power to the attitude indicator is annunciated by a flashing amber light
on the indicator. The attitude indicator is operating on backup battery power,
and pilot action is required for the gyro to continue operating.
1. Press STBY PWR button on the indicator one time.
2. Verify that the flashing amber light extinguishes.
3. Verify that the red gyro warning flag is not displayed.
4. Seek visual meteorological conditions (VMC) or land as soon as
practical (operation of standby attitude indicator is limited by battery
life).
Do not press the STBY PWR button a second time after
the flashing amber light extinguishes. This will turn off
the backup battery and the red gyro warning flag will be
displayed. If the STBY PWR button is inadvertently
pressed and the red gyro warning flag is displayed, press
the STBY PWR button again to return to battery power
operation (red gyro warning flag should not be displayed).
AFMS, GARMIN G500 PFD/MFD SYSTEM
FAA APPROVED
NOTE
WARNING
190-01102-01 Rev. 9
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