https://www.aviationpros.com/aircraft-maintenance-technology/engines-parts/aircraft-airframe-accessories/avionics/press-release/12288565/west-star-aviation-west-star-aviation-receives-stc-for-tcas-ii-version-71-upgrade-installation
West Star Aviation Receives STC for TCAS II Version 7.1 Upgrade Installation | Aviation Pros
TCAS 7.1 is required for travel in European airspace.
tcas iiweststaraviationreceives
https://support.garmin.com/en-GB/?faq=VCsK9uqNZ99mtC8wqZHuc5
(2020) Service Advisory 2009 Rev C: False TCAS II Alerts | Garmin Support
Garmin Support Center United Kingdom is where you will find answers to frequently asked questions and resources to help with all of your Garmin products.
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