(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.