The U.S. aircraft register, updated daily
Who holds what · as the FAA records the name

Avionics Support Group

Named as the FAA publishes it on its approvals.

Holds 4 approved modifications, most of them for the Boeing 737. FAA spelling: Avionics Support Group.

Approved modifications 4 · newest first

Boeing 737 3Boeing 747 1
2026-03-23ST12337AT · Installation of Collins Aerospace SAT-2200 Inmarsat Satellite Data Unit (SDU) part number 822-2556-102 or... · 747-8F Series, 747-8 Series
2025-01-07ST11858AT · Installation of a dual FreeFlight Systems RA-6500 Radio Altimeter System · 737-300 Series, 737-400 Series, 737-500 Series
2024-05-30ST04585AT · Installation of a Cobham AVIATOR 200S Inmarsat / Swift Broadband Satellite Communications System · 737-8, 737-9, 737-700 Series
ST11859AT · Upgrade of RNP Capability Utilizing Collins Aerospace GPS-4000S Receivers · 737-300 Series, 737-400 Series, 737-500 Series

Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, parts manufacturer approvals, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.