Page 5-34
400W Series Installation Manual
Rev. G
190-00356-02
5.5.6.3 Sandel SN3500 Interface Check
IF a Sandel SN3500 EHSI has been connected to a 400W Series unit, the interface should be verified as
follows:
1.
Cycle power to the GNS 400W Series unit and acknowledge the prompts until it gets to the self
test page (see Section 5.5.1).
2.
Ensure that the SN3500 is receiving valid heading.
NOTE
The Vertical Deviation Indication will not be displayed unless the SN3500 is receiving
valid heading.
3.
While the GNS 400W Series unit is displaying the self test page, verify that the SN3500 is
displaying data from the GPS source.
•
Course Deviation: Half-scale left deviation, TO indication, flag pulled
•
Vertical Deviation: Half-scale up deviation, flag pulled
•
Active Waypoint: GARMN
NOTE
If the Vertical Deviation Indication is not displayed ensure that the Main ARINC 429
Config (See Section 5.3.1) is set to Enable Labels for VNAV.
4.
On the GNS 400W Series unit verify that an OBS value is displayed (and not dashed out).
5.
Acknowledge the self test on the GNS 400W Series unit by pressing the ENT key.
6.
Select VLOC on the GNS 400W Series unit and verify that the SN3308 displays NAV 1 or NAV
2 (depending on what navigation source the GNS 430W is).
7.
Ensure that the NAV1 (or NAV2) indication does not have a red line through it.
5.5.6.4 EHSI Deviation Scaling (If HSI/CDI Is Driven by the 400W Series Unit Via Serial
Data)
If the GNS 400W Series unit has a serial connection to an EFIS display not covered by the AML STC,
proper scaling of the EFIS CDI and VDI must be verified.
1.
Cycle power to the GNS 400W Series unit and acknowledge the prompts until it gets to the self
test page (see Section 5.5.1).
2.
With the self test page displayed on the GNS 400W Series unit, look on the EHSI/EFIS and
verify that the lateral deviation is not flagged and half-scale left.
3.
With the self test page displayed on the GNS 400W Series unit, look on the EHSI/EFIS and
verify that the vertical deviation is not flagged and half-scale up.
NOTE
If the deviations are not as described, the EHSI/EFIS does not scale the GNS 400W
Series unit deviations properly and cannot be certified for GPS-based guidance. Contact
Garmin for further assistance.
Summary of Contents for GNC 420AW
Page 2: ...400W Series Installation Manual 190 00356 02 Rev G ...
Page 149: ...400W Series Installation Manual Page C 1 190 00356 02 Rev G Appendix C RESERVED ...
Page 206: ...Page H 30 400W Series Installation Manual Rev G 190 00356 02 Figure H 17 GTX 330 Interconnect ...
Page 212: ...Page H 36 400W Series Installation Manual Rev G 190 00356 02 Figure H 21 RMI OBI Interconnect ...
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