Airplane Flight Manual Supplement

AFMS, GARMIN G500/G600 SYSTEM 190-00601-01 Rev. K
FAA APPROVED Page 29 of 51
3.1.6 Loss of Electrical Power to 2-inch Electric Standby Attitude
Indicator (flashing or steady amber STBY text) (MidContinent 4200 Series)
When a 2-inch electric standby attitude indicator is installed, loss of primary
electrical power to the attitude indicator is annunciated by amber STBY text on
the Annunciation Control Unit. The attitude indicator is operating on backup
battery power, and pilot action may be required for the gyro to continue
operating.
If the amber STBY text is flashing (manual operation):
1. Press the STBY PWR button one time.
2. Verify that the amber STBY text is steadily illuminated.
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).
If the amber STBY text is steadily illuminated (automatic operation):
1. Verify that the red gyro warning flag is not displayed.
2. Seek visual meteorological conditions (VMC) or land as soon
as practical (operation of standby attitude indicator is limited
by battery life).
WARNING
Do not press the STBY PWR when the amber STBY text is
steadily illuminated. 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).