Updated AD on radar altimeter use versus the FCC's allocation of the same freq for 5G cellphone.

Scott Sherer

Here's an updated AD from the FAA on the impact that 5G frequency use granted by the FCC will have on your radar altimeter.

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There can't be very many make and models of radar altimeters. It would be useful if the FAA simply listed the affected radar altimeters.

Scott Sherer

Bendix King (Honeywell) and Garmin are about it right now for GA aircraft. There are some small companies that no longer exist that made them, too, although a long time ago. As for Airliners and transport category aircraft, I have no idea.