Table 7-1 Gts 8Xx System Flag Status - Garmin GTS 8 Series Maintenance Manual

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Ground Test
The Ground Test feature simulates aircraft flight conditions of 50,000 feet altitude and 0º heading for the
purpose of conducting the ramp and return to service tests described in Section 7.4.3.
Flag
Transponder #1 Active
Transponder #2 Active
Magnetic Variation
GPS Available
Display #1 Active
Display #2 Active
Radio Altitude Available
Mag Heading Available
Airborne Self Test Allowed
Notes:
[1] If the status flag is not active, the source is not configured or data is unavailable or invalid.
[2] If the status flag is not active, self-test can only be initiated on the ground.
7.3.1.2 Configuration Tab
The Configuration tab displays configuration data and allows the maintenance technician to configure the
GTS 8XX to the original configuration settings after maintenance has been performed (e.g., removal and
replacement). Refer to the aircraft records for a copy of the original configuration settings. The
Configuration tab also displays the status of each data source. Table 7-2 depicts status icons that can be
displayed to the left of each data source field.
When the Configuration tab is selected, the GTS 8XX reboots into Configuration mode. Changed
configuration options will be highlighted yellow until the Set Active key is clicked. Configuration items
not applicable to the GTS 8XX system are disabled in the install tool.
NOTE
After the configuration changes are complete, make sure the Set Active key is selected.
Then return to the Normal tab on the Install Tool to allow the GTS 8XX to go into Operate
mode.
NOTE
Configuration settings will be lost if the Set Active key is not selected prior to switching to
a different tab.
190-01279-01
Rev. 2

Table 7-1 GTS 8XX System Flag Status

Active Flag Description
Transponder #1 is active.
Transponder #2 is active.
Magnetic variation data (difference between "true" North and magnetic
North) is available.
GPS Position, Velocity, and Time source is configured and valid data is
available. [1]
Traffic display #1 discrete input is active.
Traffic display #2 discrete input is active.
Radio altitude source is configured, and valid data is available. [1]
Magnetic heading source is configured, and valid data is available. [1]
Self-test can be initiated while airborne. [2]
GTS 8XX Part 23 AML STC Maintenance Manual
Page 7-5

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