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(2015) Service Advisory 1540: GTN 7XX Units with Main Software Version 5.11 or 5.13 and FliteCharts® Updates
AFFECTED PRODUCTS:
GTN 725 and GTN 750 units using Main Software Version 5.11 or 5.13.
ISSUE:
GTN Main Software Versions 5.11 and 5.13 changed the way that FliteCharts data are handled by GTN 7XX units. In some cases a new FliteCharts data update may become corrupted, causing the GTN datacard to become unusable. (GTN 6XX units do not use FliteCharts and are not affected.)
PILOT ACTION:
Owners and operators of GTN 7XX units with v5.11 or v5.13 software should not update the FliteCharts database without first performing the steps outlined in this Service Advisory 1540.