190-01007-C1
GTN Xi Part 23 AML STC Maintenance Manual
Rev. 1
Page 7-12
7.3.1.2 Navigation Indicator Ground Checks (Configuration Mode)
7.3.1.2.1 Main Indicator Check (Analog Only)
NOTE
If the GTN Xi is interfaced to an electronic HSI/EFIS, and the main indicator analog
output is not used, this check is not required.
NOTE
To verify if the indicator is interfaced with the GTN Xi on the main connector (P1001),
examine the response of the indicator during the GTN Xi self-test upon power-up. If the
indicator responds according to the values described on the screen, then it is connected to
the main connector.
If the GTN Xi is interfaced to an analog indicator on the main connector (P1001), perform the following
steps in Configuration mode. Refer to Section 3.2.2.
1. From the Configuration Mode home page, touch the
GTN Diagnostics
key.
2. Touch the
Main Indicator (Analog)
key.
3. Verify correct operation of the lateral deviation, flag, and TO/FROM flag using the corresponding
selections.
4. Verify correct operation of the vertical deviation and flag using the corresponding selections.
5. Verify correct operation of the OBS knob using the OBS Resolver Setting display.
a. At 30° increments around the OBS card, ensure that the indicated value is within 2° of the
value set on the indicator.
b. If the resolver is not within 2°, calibrate the resolver as described in Section 7.3.1.1.1.1.
7.3.1.2.2 VOR/LOC/GS Indicator
If the GTN Xi is interfaced to an analog indicator on the VOR/ILS connector (P1004), perform the
following steps:
1. From the Configuration mode home page, touch the
GTN Diagnostics
key.
2. Touch the
VOR/ILS Indicator (Analog)
key.
3. Verify correct operation of the lateral deviation, flag, and TO/FROM flag using the corresponding
selections.
4. Verify correct operation of the vertical deviation and flag using the corresponding selections.
5. Verify correct operation of the OBS knob using the Selected Course display.
a. At 30° increments around the OBS card, ensure that the indicated value is within 2° of the
value set on the indicator.
b. If the resolver is not within 2°, calibrate the resolver as described in Section 7.3.1.1.2.1.
