01/04/2018
https://www.avweb.com/avwebflash/news/Do-not-approve-FAA-Extends-ADS-B-Mandate-to-2040-230532-1.html
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Conceding that aircraft owners--and even airlines--aren t equipping quickly enough with ADS-B, the FAA on Sunday announced that it s extending the mandate deadline to January 1, 2040. Previously the equipage deadline was 2020.