Mekong Posted January 20, 2022 Author Report Share Posted January 20, 2022 So US Manufactured Aviall, as used on Boeing Bad, French Manufactured Thales, as used on Airbus Good? The Aviall band pass filter on their Altimeter has not been an issue for 30 years, the Altimeter is not the issue, the problem is which ever dickhead signed off on 3.7 to 3.98 GHz frequency for C Band in the USA instead of the 3.4 to 3.8 used in Europe and the rest of the world. if it was the Boeing Aviall altimeter at fault Boeingwould have problems globally not just in the USA How thick was that brown envelope? Link to comment Share on other sites More sharing options...
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