What !!
https://www.faa.gov/5g
Disruption Risk to Aviation from 5G
Because the proposed 5G deployment involves a new combination of power levels, frequencies, proximity to flight operations, and other factors, the FAA will need to impose restrictions on flight operations using certain types of radar altimeter equipment close to antennas in 5G networks.
These safety restrictions could affect flight schedules and operations, affecting the aviation system. Before and after the 5G deployment begins, the FAA will continue to work every day to reduce effects of this disruption as we make progress to safely integrate 5G and aviation.
Collaborative Work Underway to Reduce Delay, Cancellation Risk
Approved radio altimeters will allow commercial aircraft to continue low-visibility landings in the 5G C-Band deployment areas.
The agency has made progress during the last two weeks to safely reduce the risk of delays and cancellations as altimeter manufacturers evaluate data from the wireless companies to determine how robust each model is.
This work has shown some altimeters are reliable and accurate in the 5G areas; others must be retrofitted or replaced.
Die Hard anyone ?