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ADVOCATING FOR YOU


regulatory issue involving multiple US gov- ernment agencies. Turning that ship takes time, and more importantly, we had to first try every method of regulatory relief possi- ble. During that time, we kept Congress informed. But before potential legislative remedies could be engaged, we needed to show our elected representatives that we were working through proper channels in a good-faith effort to arrive at a resolution with the FCC.


International Actions on Spectrum Interference Spectrum interference, of course, doesn’t respect geographic boundaries, and HAI is addressing this issue on the international front as well.


In October 2020, the Radio Technical Commission for Aeronautics (RTCA), an organization that works with the FAA and global stakeholders to develop standards for aviation electronics, released a report confirming that spectrum interference with radar altimeters would be harmful to civil aircraft operations. Following the publica- tion of this report, spectrum and aviation regulators around the world recognized the dangers that interference could pose to air- craft operations. Many acted quickly to both further refine the data and issue advisories. Several countries and regions are now using the information provided in the RTCA report to further research the issue of spec- trum interference. The European Confer- ence of Postal and Telecommunications Administrations and the European Union Aviation Safety Agency (EASA) are collect- ing information directly from radar altimeter and aircraft manufacturers to further develop their studies. Other countries, such as Japan and


France, have already taken preventive mea- sures to protect their national aviation oper- ations. Additional international studies


12 ROTOR SEPTEMBER 2021


independent of the RTCA report performed by the International Civil Aviation Organization (ICAO) show that interference with radar altimeters is possible, which prompted a letter from ICAO to states to investigate the issue further. Transport Canada Civil Aviation, that


country’s civil aviation regulator, released a regulatory proposal addressing the radio altimeter interference issue. The proposal explores various spectrum mitigations, including restrictions of 5G in the 3,450– 3,650 MHz band near major and minor commercial airports. The document’s release initiated a 15-day technical consul- tation on proposed amendments to techni- cal requirements for fixed and mobile systems operating in the band that can affect radar altimeters. Additional studies are underway in Canada and other coun- tries to further assess the potential effects of radio altimeter interference from 5G systems. The industry coalition Technical and Operations Working Group, co-chaired by HAI, is evaluating Canada’s regulatory pro- posal alongside other international guid- ance to conduct further research on options to mitigate spectrum interference.


HAI’s Proposed Solutions The aviation coalition has petitioned the FCC to reconsider its decision to repurpose C band spectrum. However, the reality is that 5G deployment is coming, and there’s little to no chance of preventing its Dec. 5 deployment. The fight now is to ensure it’s done in a way that protects aviation safety. The FCC should, at a minimum, partner


with the FAA to jointly oversee a forum where the telecommunications and avia- tion industries will discuss a mutually agreeable, viable, and minimally disruptive path forward on 5G deployment. This should be done in an atmosphere of


transparency that is focused on finding solutions. The aviation industry coalition continues


to provide helpful information to inform reg- ulators and lawmakers about the impact of 5G interference on radar altimeters. The same cannot be said of the telecommuni- cations industry. HAI, as co-chair of the Technical and Operations Working Group, is also working to develop mitigations, but without further data from the wireless industry, our solutions are limited. The other elephant in the room is the


cost. Retrofits will be needed to maintain safety, which will require the purchase and installation of new equipment for what could be the majority of aircraft in operation today. The federal government sold the spec-


trum adjacent to the C band for $80 billion. HAI believes our industry and aviation as a whole shouldn’t be obligated to cover the costs associated with the wireless indus- try’s gain. HAI is working with key authoriz- ers and appropriators on Capitol Hill to find an equitable path forward.


We Need YOUR Support HAI is working on behalf of you and our industry to ensure the needs of our com- munity—such as working radar altime- ters—are addressed. Very shortly, we’ll issue an HAI Advocacy Call to Action asking you to contact your elected officials with requests for their assistance on the spec- trum problem. At that time, we’ll provide all the information you’ll need to reach out and present your input to your representatives. Look for additional updates in HAI


Washington Update, our members-only Legislative Action Center, and this column in ROTOR. In the meantime, we encourage you to visit rotor.org/advocacy and sign up for HAI Legislative Alerts. Working together, we’ll move our industry forward!


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