Section 6: Troubleshooting; Monitoring The Data Link - Garmin 400 Series Pilot's Manual Addendum

Section 6: Troubleshooting

Although it is the responsibility of the facility that installed the GDL 49 or GDL 69/69A to correct any
hardware problems, you can perform some quick troubleshooting steps to find the possible cause of a
failure.
First, ensure that the owner/operator of the aircraft in which the GDL 49 or GDL 69/69A is installed
has subscribed to Echo Flight or XM Satellite Radio for a Service Plan, and verify that it has been activated.
Perform a quick check of the circuit breakers to ensure the GDL 49 or GLD 69/69A has power applied. If
a failure still exists, continue to the Data Link Status Page.
The fields on the Data Link Status Page may provide insight to a possible failure. Information dis-
played at this page should be noted and provided to the repair station. The Connectivity Message table
should also provide a clear indication of any potential internal failures. If no indications exist, check the
circuit breakers and electrical connections to the GDL 49 or GDL 69/69A, and ensure the unit has power
applied. Repair stations are equipped to repair the system, should a hardware failure exist.

Monitoring the Data Link

The Data Link Status Page provides an indication of the integrity of the Data Link. The Data Link Page
allows you to monitor the system and determine the possible cause of a failure.
To view the Data Link Status Page:
1. From the AUX Page Group, select the Data Link Page.
2. Highlight 'Data Link Status' and press ENT.
3. The Data Link Status Page is displayed.
Section 6
Troubleshooting
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