Display - Garmin GTN 6 Series Maintenance Manual

6.6.5

Display

Perform the interface check for the replaced EFIS. No additional configuration on the GTN is required
when replacing a display with an equivalent unit.
6.6.5.1 EFIS Deviation Scaling for HSI/CDI Driven by GTN through ARINC 429 Data
If the GTN has a serial connection to an EFIS display, proper scaling of the EFIS CDI and VDI must be
verified.
1. Cycle power to the GTN and acknowledge the prompts until on the Instrument Panel Self-Test
page (refer to Section 5.1.1).
2. With the Instrument Panel Self-Test page displayed on the GTN, look on the EFIS and verify that
the lateral deviation is half-scale left and not flagged. If not correct, refer to applicable EFIS
maintenance documentation.
3. With the Instrument Panel Self-Test page displayed on the GTN, look on the EFIS and verify that
the vertical deviation is half-scale up and not flagged. If not correct, refer to applicable EFIS
maintenance documentation.
190-01007-B1
Rev. 4
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
Page 6-20