Apparently the equipment manufacturers and scientists / engineers say there is no safety issues posed by 5G.
The actual issue is we live in a "prove it" environment, especially when aviation is concerned.
When the FCC approved the 5G spectrum for use in the United States, they made sure there was a built-in buffer between the spectrum used by 5G and that used by aircraft. This built-in buffer mathematically makes it impossible for there to be any actual interference between frequencies in theory according to the scientists / engineers.
However, "in theory" is is the key issue here. The FAA, airlines and airplane manufacturers want scientific proof and real life data that shows that there will be no interference. And that is the catch22. How you prove it in real life examples is by fly aircraft thousands of times landing testing the altimeters for interference with active 5G. And as far as aviation is concerned, they won't take the chance to test this in real life scenarios.
Since they won't accept the frequency scientists answers on this here we are. 5G will have major impacts on flights causing disruptions where 5G is activated around airports. And the rollout of 5G is being paused near key / major airports.
5G use from other countries where it is near airports is not acceptable data for real life scenarios because it is on a different spectrum not so close to the one aviation uses.
Talking to a coworker about this, his thoughts are it's not real science if you don't prove it in experiments. He says they need to experiment over some wide open area like Idaho.
He's also concerned about 5G already being turned on in Boston for more than a year right near the airport. He lives right by the airport and is worried about a plane crashing.
Weather related flight disruptions are up in Boston since the 5G rollout. If there is low visibility, flights are being canceled or diverted to other airports simply because 5G is activated in the area and they don't want to take the chance.
Also, saying 5G is the safety issue is really bad reporting.
5G is not the issue, but rather a newly released C-band 5G spectrum (3.7-3.98 GHz); which the FCC auctioned off the rights to back around the end of 2020. That's quite near the radar altimeter operating frequencies of (4.2-4.4 GHz).
So it's just the C-band spectrum that's the issue. But it seems like we are talking about and handling it like a blanket of all 5G both in reporting and rollout / safety concerns around airports.