Avionics
FAA Issues SAIB on 5G Radio Altimeter Interference
The issue of 5G cellular network interference with radio altimeters continues to draw attention from the FAA.

The FAA has published a Special Airworthiness Information Bulletin—AIR-21-18—that highlights potential radio altimeter interference issues by new 5G cellular networks. The 5G network deployment in the U.S. starting on December 5 is in the 3700 to 3800-MHz bands then later in the 3700 to 3980-MHz bands. Radio altimeters use the 4200 to 4400-MHz band.


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