Installation Instructions

GTN 6XX/7XX AML STC Installation Manual 190-01007-A3
Page 5-36 Rev. 4
5.5.2.1.2 Airport Criteria Configuration
For installations of the GTN with TAWS enabled, the GTN
provides aural and visual terrain alerts. The alerting algorithm
adapts the terrain alerting criteria based on nearby airports. The
GTN must be configured to specify the minimum criteria that an
airport must meet to be considered as a nearby airport for the
purpose of TAWS/Terrain alerting. For installations with TAWS
enabled, obtain the information listed in Table 5-35.
Table 5-35. TAWS Airframe-Specific Configuration Data
Item Description POH/AFM Section Note
Runway
Surface
Type of surfaces that the
runway must have for the
aircraft to land.
N/A
Set to type of runway surface that the
aircraft will typically use.
Minimum
Length
Minimum length that
runway must have before
being considered a runway
by TAWS alerting.
5-Performance
Set to the shortest ground roll distance
required for takeoff/landing operations
(typically the distance given for sea
level using the coldest temperature
given in the POH/AFM).
Configure TAWS Terrain Alerting and Airport Criteria as follows:
1. Access the GTN Options configuration page by touching the GTN Options key from the
Configuration Mode Home page, then touch the TAWS key.
2. Touch the Runway Surface key and select the applicable runway surface type as determined from
the information in Table 5-35.
3. Touch the Minimum Length key and enter the minimum length value from the information in
Table 5-35. This field has a range of 0 to 25,000 ft and defaults to zero.
Figure 5-21. TAWS
Configuration Page