MAKE CHAPTER 288 YOUR AVIATION HOME! E-AB, TYPE CERTIFIED, VINTAGE, WARBIRD, ETC.
On December 30, 2019, the FAA published its latest revision to Advisory Circular (AC) 90-114 (Revision B), Automatic Dependent Surveillance-Broadcast Operations which provides comprehensive guidance on ADS-B operations in the National Airspace System (NAS) in accordance with ADS-B regulations (14 CFR sections 91.225 and 91.227). Of note in this revision is the clarification of certain operational policies like aircraft that are exempt from 91.225 (Section 3.2), ADS-B Out operations during formation flying activities (Section 4.3.1) and during aerobatic flight (Section 22.214.171.124.2), and inoperative ADS-B procedures (Section 126.96.36.199).
The AC also provides a helpful overview of the ADS-B system architecture, the various forms of available equipment, broadcast services available to ADS-B users, and operational considerations with regard to equipment performance requirements and airspace restrictions. To access AC 90-114B, go to https://go.usa.gov/xd375.