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Do the KNS-80 and KNS-81 Nav Systems contain FM immunity for use in Europe?

April 26, 2017contain Europe FM Immunity kns-80 kns-81 NAV SYSTEMS

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Do the KNS-80 and KNS-81 Nav Systems contain FM immunity for use in Europe?

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Neither the KNS-80 or KNS-81 Nav Systems contain FM immunity. Likewise, there are no modifications or service bulletins that can be incorporated to achieve FM immunity. However, the KNS-81 can be used in conjunction with KA-155 FM filter to achieve FM immunity. KNS-81 units must have Mod 14 to be compatible with the KA-155. KNS-81 units above serial number 8309 already have this mod incorporated. The approximate cost to add Mod 14 is $150-$250 including testing. According to Revision 4 of the KA-155 installation manual, the KNS-80 can be used with the KA-155 filter as well.