The FAA Telecommunications Infrastructure is the US Federal Aviation Administration's network for radio transmissions, weather reports, radar data, messages, etc. for air traffic control in the United States, serving thousands of air-traffic controllers in US airspace. L3Harris Technologies has been its primary government contractor since 2002, and as of November 2026 has upgraded 70% of it from copper wire to fiber optic under the aegis of project FAA Enterprise Network Services (FENS).
On 13 November 2026 routine replacement of obsolete copper wiring with fiber optic by primary government contractor L3Harris was determined by US government investigators to be the proximate cause of the 2026 FAA nationwide ground stop.