Garmin GNS 530AW Installation Manual - page 112

Page 5-34 

500W Series Installation Manual 

Rev. D 

190-00357-02  

3.

While the GNS 500W 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 500W Series unit verify that an OBS value is displayed (and not dashed out). 

5.

Acknowledge the self test on the GNS 500W Series unit by pressing the ENT key. 

6.

Select VLOC on the GNS 500W Series unit and verify that the SN3308 displays NAV 1 or NAV 

2 (depending on what navigation source the GNS 530W is).  

7.

Ensure that the NAV1 (or NAV2) indication does not have a red line through it. 

5.5.7.4  EHSI Deviation Scaling (If HSI/CDI Is Driven by the 500W Series Unit Via Serial 

Data) 

If the GNS 500W 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 500W 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 500W 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 500W 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 500W 

Series unit deviations properly and cannot be certified for GPS-based guidance.  Contact 

Garmin for further assistance.