Garmin GTN 6 series Maintenance Manual - page 116
System Maintenance Manual GTN 6XX/7XX Part 23 AML STC
190-01007-A1
Page 7-20
Rev. 6
The following additional steps should only be completed if the GTN is controlling the traffic system.
1. Pull the transponder circuit breaker and verify the air data fields are red ‘X’d.
2. If a squat switch (or airspeed switch) is connected to the GTX 33/330, ensure that it is in AIR
mode.
3. Alternately touch the Standby key and Operate key to change the mode of the traffic system. It
may take several seconds for the traffic system to change modes.
4. Verify that the mode of the traffic system can be changed.
7.4.6
Weather Radar
Perform the appropriate interface check for the weather radar. No additional GTN configuration steps are
required for replacing a weather radar with an equivalent unit.
7.4.6.1
GWX 68/70 Weather Radar Interface Check
This section verifies that the interface between the GTN 7XX and the GWX 68/70 weather radar is
functional.
1. Start the GTN in normal mode.
2. On the Home page, touch the Weather key and then the Radar key.
3. Touch the Mode key and select Standby mode and wait for the warm-up to complete.
4. Touch the Mode key again and select Test mode.
5. Verify that the GWX 68/70 begins sweeping and the test pattern is shown.
6. If supported by the installation, verify that stabilization is on (STAB On is displayed in the upper
right corner of the radar display).
7. Touch the Mode key, set the mode to Off.
Repeat steps 1 through 7 for the second GTN 7XX (if installed).