Database Check; Data Card Replacement; Afms Update - Garmin GNS 480 Installation Manaul

3.3.3.5 Autopilot Flight Test Check
1. Enter and activate a flight plan on the GNS 480. Engage the autopilot in the GPSS mode. Verify that
the autopilot flies the course.
2. Disengage the autopilot and fly off course. Re-engage the autopilot (in GPSS mode) and verify that it
correctly intercepts the course and continues to fly it.
3. Turn off the autopilot GPSS but leave the autopilot engaged in NAV mode. Verify that it maintains
the current course.
4. Reselect the GPSS mode on the autopilot. Press the CDI key to select NAV on the GNS 480. Verify
that the GPSS mode disengages.

3.4 Database Check

Check the database to ensure it is current. The database information is displayed at startup. To check the database:
1. Turn off the GNS 480 and then turn it on. The GNS 480 will go through its normal start-up sequence.
2. Wait for the database page to be displayed.
3. Verify that the database is not expired (the expiration date will be displayed in green text if the
database is current, and yellow text if it has expired).
If the database card has to be reprogrammed with a new revision, remove and replace the database card as
described in the following section.
3.4.1

Data Card Replacement

Handle the data card carefully. Do not touch the connector edge of the data card. Do
not insert or remove the data card within 10 seconds after the GNS 480 is turned on.
To replace the data card do the following:
1. Ensure that the GNS 480 is turned off.
2. Press the data card ejector to eject the card and remove the data card. Gently pull the card straight out
of the slot.
3. With the label facing left, insert the new data card by pushing the card straight into the slot and press
firmly into place. When fully inserted, the ejector button will be flush with the top of the data card.

3.5 AFMS Update

Ensure the Aircraft Flight Manual Supplement (AFMS) part number 560-0985-01, Rev F or later, is
updated with the appropriate check box option in sections 2.4 – Navigation, and 2.7 – GDL 90 Control.
GNS 480 (CNX80) Installation Manual
Post-Installation Configuration & Checkout
CAUTION
560-0982-01 Rev L 3-43