Terrain Checks - Garmin GI 275 Installation Manual

6.3.4

Terrain Checks

6.3.4.1 External TAWS Check
This check is required if the GI 275 MFD or Primary ADI is configured for External TAWS.
1. Power on the GI 275 in Normal mode.
2. Power on the External TAWS source (GNS 400W/500W, GTN 6XX/7XX, or GTN Xi).
3. Wait for the GPS signal to be acquired and the TAWS system check to report "OK".
4. Once the test is complete, select TAWS Inhibit and verify that the GI 275 displays "TAWS
Inhibit".
5. De-select TAWS Inhibit.
6.3.4.2 Terrain Display
This check is required for an MFD displaying the Terrain page.
1. Power on the GI 275 in Normal mode.
2. Navigate to the Terrain page (Menu → Select Page → Terrain or turn the outer knob).
3. Verify the display shows a red background (indicating surrounding terrain is 100 feet below the
aircraft and above).
4. Touch the radius button on the left side of the screen and adjust the radius wider with the inner
knob until an obstacle (tower figure) is displayed on the screen.
5. Change the view from 360° to Arc (Menu → Terrain Options → View) and verify that the view
on the display changes.
6. Perform a Terrain Test (Menu → Terrain Options → Terrain Test). "TER TEST" will display in
white at the bottom of the screen.
190-02246-10
Rev. 11
GI 275 Part 23 AML STC Installation Manual
Page 6-12