All GTS Processor GTS 825/GTS 855/GTS 8000 units (011-02571-0( )) with software version 3.13 (or earlier) and interfaced to a GTN 6XX/7XX, GNS 4XX(W)/5XX(W), GNS 480, G500, G500H, G600, GMX 200, MX20, or other 3rd party flight display systems are affected.
The current GTS Processor software version can be viewed by using the GTS Processor Install Tool (refer to the Modification Instructions section of this bulletin), on the software label adjacent to the GTS Processor serial number tag (for installations unable to electronically display the software part number), or on the display for those units interfaced through HSDB (e.g. GTN 6XX/7XX, G500, G500H, and G600).
Optional: This Service Bulletin may be incorporated at the owner’s discretion and is not warranty reimbursable.
GTS Processor software version 3.14 improves filtering of replies that can cause range rate spikes on intruders. This resolves a scenario that can cause TAs or RAs to be generated on targets that are greater than 10 NM away.