Skip navigation links
Unsupported Browser Detected – For best results, please update your browser.

Aviation Alerts and Advisories

GDL 84/88 System Software Version 3.42 and WAAS Software Version 5.3


GDL 84/88 units listed in the table below are affected.

Appliance P/NModel
011-02369-00GDL 88
011-02370-00GDL 88 w/WAAS
011-02371-00GDL 88D
011-02372-00GDL 88D w/WAAS
011-02369-10GDL 88H
011-02370-10GDL 88H w/WAAS
011-02371-10GDL 88DH
011-02372-10GDL 88DH w/WAAS
011-03727-00GDL 84 w/WAAS
011-03728-00GDL 84H w/WAAS



TSO Authorization


Recommended: Garmin recommends the incorporation of this Service Bulletin at the next scheduled service interval.


GDL 84/88 System Software Version 3.42 provides the following:

    • fixes an issue where some ADS-B traffic intruders may not be displayed when over 200 ADS-B intruders are within range

Active TCAS surveillance is not affected by this issue.

    • provides FIS-B processing improvements

WAAS Software Version 5.3 (if applicable) fixes a GPS date problem beginning August 16, 2020. The GDL 84/88 may report an incorrect GPS date if the GPS receiver has not acquired a 3D navigation solution within the last 128 weeks.

ASDN Service Bulletin 2015 Rev A