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190-01007-A1
Rev. 7
System Maintenance Manual GTN 6XX/7XX Part 23 AML STC
Page 3-12
3.4.4.1 TAWS-B Enablement
When the optional TAWS feature is enabled, the GTN will provide Class B TAWS functionality. This
section describes how to reactivate the TAWS feature in the GTN.
NOTE
For first time TAWS enablement, refer to the GTN 6XX/7XX AML STC IM, P/N 190-01007-A3,
for additional requirements and checkout procedures. This manual only describes the
necessary steps to re-enable the feature for existing installations.
1. Turn the GTN off by pulling the NAV/GPS
circuit
bre
aker.
2. Remove the database SD card from the data card sl
ot
and ins
ert the TAWS Enablement Card,
P/N 010-00878-01, which was used at the
initial
inst
allation.
3. Enter configuration mode by applying power (closing
the circuit breaker) to th
e GTN while holding the
HO
ME key.
4. Go to the Terrain Configuration page from th
e GTN
Opt
ions page. Touch the TAWS B key.
When the TAWS feature is activated, the TAWS B key will be
lit green, as shown in Figure 3-13.
NOTE
The feature enablement card should be provided to the
customer after service has been completed.
3.4.4.1.1 TAWS-B Configuration Options
When TAWS-B is enabled as shown in Figure 3-13, the following configuration settings may be accessed:
TAWS Audio
This configuration setting allows the user to select aural alert messages for various caution and warning
types.
Airport Criteria
The GTN TAWS alerting algorithm adapts the terrain alerting criteria based on nearby airports. The
Airport Criteria configuration options allow the user to select the minimum criteria that the airport must
meet to be considered as a nearby airport for the purpose of TAWS alerting. See Section 7.5.1 for more
details.
Figure 3-13. GTN 7XX TAWS
Configuration Page