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

Southern Ohio Avn CO

Named as the FAA publishes it on its approvals.

Holds 4 approved modifications, most of them for the Douglas DC-3. FAA spelling: Southern Ohio Avn Co.

Approved modifications 4 · newest first

Douglas DC-3 1
1960-01-01SA1-83 · Camera in fuselage tail section. · 600 Series
1960-01-01SA358EA · Increased capacity of divans and seat. · DC-3 Series
SA1-142 · Modified ARC A13-B antenna. · 680, 500, 560
SA1-445 · ARC Type A13-B VHF navigational antenna on vertical fin. · 680, 500, 560

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.