Installation Instructions

190-01007-A3 GTN 6XX/7XX AML STC Installation Manual

Rev. 4 Page 5-83

5.6 Ground Checks (Configuration Mode)

The following checks are done in Configuration Mode. For instructions on entering Configuration Mode,

see Section 5.5.

5.6.1 Main Indicator Check (Analog Only)

NOTE

If the GTN is interfaced to an electronic HSI/EFIS and the main indicator analog output

is not used, this check is not required.

If the GTN is interfaced to an analog indicator on the main CDI/OBS (P1001), perform the following

steps:

1. Go to the GTN Diagnostics page. See Section 5.5.3.

2. Go to the Main Indicator (Analog) page.

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. At 30°

increments around the OBS card, ensure that the indicated value is within 2° of the value set on

the indicator. If the resolver is not within 2°, calibrate the resolver as described in Section 5.5.1.5.

5.6.2 VOR/LOC/GS Indicator (GTN 650/750 Only)

If the GTN is interfaced to an analog indicator on the VOR/ILS Indicator output (P1004), perform the

following steps:

1. Go to the GTN Diagnostics page.

2. Go to the VOR/ILS Indicator diagnostics page.

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. At 30° increments

around the OBS card, ensure that the indicated value is within 2° of the value set on the indicator.

If the resolver is not within 2°, calibrate the resolver as described in Section 5.5.1.11.