Avionics
FAA Revises Safety Alert on 5G Interference
Update encourages operators to upgrade to 5G-resistant radar altimeters

The ongoing issue of potential interference to radio altimeters (radalts) and related equipment from 5G C-band cellular broadband signals has prompted the FAA to issue revised Safety Alerts for Pilots (SaFo) 21007.

New information in the revised alert contains a summary of the compliance requirements of several airworthiness directives issued earlier this year that apply to all transport- and commuter-category airplanes, as well as all helicopters, equipped with a radalt. These ADs were issued due to a determination that radalts cannot be relied upon to perform properly when they are operating in the presence of 5G C-band signals.

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