Figure 6-5 Audio Configuration Page; Figure 6-6 Terrain Configuration Page - Garmin GTN 6 Series Maintenance Manual

6.13 HTerrain/HTAWS System Checks (For Units with HTerrain/HTAWS Only)
Re-configure HTerrain/HTAWS settings per the Configuration Checkout Log. The Terrain Configuration
settings are located under the GTN Options menu.

Figure 6-5 Audio Configuration Page

NOTE
If no audio message is heard, then a fault exists within the audio system or associated
wiring, and the HTerrain/HTAWS capability must be considered non-functional. Verify the
wiring to the audio panel.
NOTE
If any of the annunciators do not light up, then verify that discrete output is configured
properly. If the discrete output is configured properly, then the fault exists within the
annunciator or the wiring.
NOTE
A 3D GPS position fix is required to conduct the check.
While on the ground, apply power to the GTN and audio panel following normal power-up procedures.
1. Select the Terrain page from the Normal mode home page.
2. Touch the Menu key.
3. Touch the Test Terrain or Test HTAWS key.
4. Verify that all external HTAWS annunciators (if installed) light up.
5. Wait until the HTerrain/HTAWS self-test completes (10-15 seconds) to hear the HTerrain/
HTAWS system status aural message.
• The aural message "Terrain system test OK" or "HTAWS system test OK" annunciates if
the HTerrain/HTAWS system is functioning properly
• The aural message "Terrain system failure" or "HTAWS system failure" annunciates if the
HTerrain/HTAWS system is NOT functioning properly. Also, "Terrain FAIL" or "HTAWS
FAIL" will appear in amber on the screen
190-01007-B1
Rev. 4

Figure 6-6 Terrain Configuration Page

GTN 6XX/7XX Part 27 AML STC Maintenance Manual
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