Who holds what · as the FAA records the name

Schwien Engineering CO.

Named as the FAA publishes it on its approvals.

Approved to make 1 class of equipment. FAA spelling: Schwien Engineering Co..

Equipment approvals technical standard order authorisations

1990-01-01TSO-C3A · Turn and Slip Instrument · *, *, * · instruments and avionics

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.