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The 5G wireless service will be delayed by AT&T and Verizon because airlines say it may pose a safety risk.
Without action, airlines could be forced into widespread and unacceptable disruption, according to a letter Friday to the wireless providers.
The two officials said that diverted airplanes could cause a domino effect throughout the U.S. air transportation system.
There is a debate over what effect the new wireless service might have. The FAA and aviation community raised safety concerns against wireless providers and the FCC, which authorized the planned new 5G service and said there was no threat to safety.
There is an argument about altitude-sensitive devices called radar altimeters that operate on frequencies close to those assigned to the new 5G service. The FAA warned that aircraft safety devices could malfunction.
The wireless industry pointed out that 5G operations outside the U.S. haven't harmed aviation, and that power levels are low enough to preclude interference. In some cases, the protections requested by U.S. airlines have been instituted because of the different power levels and frequencies in other nations.
The FAA has issued warnings about 5G interference with expanded aircraft.
The U.S. officials requested a delay of no more than two weeks. The aviation industry and the FAA will identify airports where a buffer zone can be put in place to allow flights to continue safely.
The transportation officials asked the companies to hold off on the new service because of the two-week delay. They proposed that the service could be activated near those airports on a rolling basis.
They said that most 5G customers could use the new service, but critical runways would be protected. The FAA is trying to identify airports that are priority airports and seek to identify mitigations that will allow most large commercial aircraft to operate safely.
The proposal reduces and spreads the short-term economic and operational burden while permanent fixes are quickly put into place. Significant disruptions for aviation operations in the U.S. will still be involved, but it is a better way forward than the current trajectory.
The new service was put off by AT&T and Verizon because of aviation concerns.
Rich Young, a spokesman for the company, said that the company needs time to review the letter.
Kim Hart said the company was looking at the letter.
Failure to reach a solution by January 5 will force the U.S. aviation sector to take steps to protect the safety of the traveling public.
Priority airports.
The proposal would allow the government to quickly assess risks and is a much better way forward than the current trajectory, according to the letter.
The top two aviation regulators in the U.S. said that they needed to maintain aviation safety, but that they recognized the importance of moving forward on 5G.
The United States has the safest aviation system in the world. We identify risks and eliminate them every day.
The issue of potential interference with aircraft equipment has been percolating for a long time, but the risks depend on detailed analysis of tower locations and precise radio beam power levels. In the last few weeks, detailed data has been turned over to the FAA.
The FAA is working with manufacturers of radar altimeters to better understand potential interference, but needs more time to identify priority airports and complete technical work, the letter said.
Buttigieg asked AT&T and Verizon to delay 5G over aviation concerns.
There is an update post.
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