Garmin GI 275 Installation Manual page 280

4. In the upper-left corner of the Traffic page, verify that the Traffic Status is either "TAS/TCAS:
OPER" or "TAS/TCAS: STBY" (i.e., "TIS: FAIL" or "TAS/TCAS: FAIL" must not be displayed).
5. Change the Traffic Status mode between Operate and Standby (Menu → Traffic Options).
6. Verify that the mode of the traffic system is updated accordingly ("STBY" will be annunciated
above ownship icon when in Standby mode; "TRAFFIC" will be annunciated at the top of the
screen in Operate mode).
7. Put the traffic system in Standby mode and initiate a traffic system self-test by selecting the Test
button ("TEST MODE" will annunciate at the top of the screen for approximately 5 seconds).
8. Verify that the traffic system runs a self-test and the self-test traffic pattern is displayed.
6.3.3.3 TIS-A Traffic Interface Check
This check is required for units configured as an HSI (with Enhanced HSI page), HSI/Standby ADI (with
Enhanced HSI page), and MFD (with Traffic page) only if a Garmin GTX 33X Transponder is connected
to the GI 275 system, and no other traffic systems covered in Section 6.3.3.1 or Section 6.3.3.2 are
installed.
1. Power on the GI 275 in Normal mode.
2. HSI: Navigate to the HSI Map page.
MFD: Navigate to the Traffic page.
3. Power on the GTX 33X by pressing ALT on the GTX 33X.
4. On the GI 275, verify that the Traffic Status is not "TIS Fail" (i.e., no fail annunciations).
5. Verify that the amber "NO DATA" is not displayed over the ownship symbol.
a. HSI: This completes the check.
6. Verify that the Traffic Status is in Standby mode (Menu → Traffic Options).
7. Attempt to place the system in Operate mode. If the aircraft is within TIS-A coverage, the system
will display "TRAFFIC". If the aircraft is not within TIS-A coverage, the unit will display
"Unavailable".
6.3.3.4 SVT Traffic Check
This check is required if Synthetic Vision is enabled and a traffic source is interfaced to a Primary ADI.
NOTE
It may take up to a minute for the synthetic terrain data to be displayed on the ADI. Until
SVT is active, the horizon display will be the standard blue over brown.
1. Power on all GI 275s in Normal mode.
2. Wait for the GPS signal to be acquired and the TAWS system check to report "OK".
3. From the menu, select TAWS Test and verify that the GI 275 displays "TAWS Test".
4. Once the test is complete, select TAWS Inhibit and verify that the GI 275 displays "TAWS
Inhibit".
5. De-select TAWS Inhibit.
190-02246-10
Rev. 11
GI 275 Part 23 AML STC Installation Manual
Page 6-11