Garmin Pilot User's Guide for Android User Manual page 40

Overview
Configuring the GDL 39 for a Pressurized or Non-Pressurized
Aircraft:
1) From any page tap
2) Tap the GDL 39 Tab.
3) Tap Pressurized Cabin to select/deselect.
Updating GDL 39 Firmware:
1) Ensure the tablet and the GDL 39 are connected to a reliable external
power source.
2) From any page tap
3) Tap the GDL 39 Tab.
4) Tap
available.
Caution: Never remove power from the GDL 39 or power off the Android
device during a GDL 39 firmware update. If power is removed from the GDL
39 during a firmware update it will be rendered inoperable and service will
be required.
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. The 'Update' button is only displayed when an update is
GDL 39 Firmware Warning
Garmin Pilot for Android User's Guide
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190-01532-00 Rev. A