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

Quantum Swiss LLC

Named as the FAA publishes it on its approvals.

Holds 4 approved modifications, most of them for the Cessna 150. FAA spelling: Quantum Swiss LLC.

Approved modifications 4 · newest first

Cessna 150 2Cessna 177 Cardinal 1
2022-07-12SA1034SW · Installation of Lycoming O-320-E2D engine and Sensenich 74DM or McCauley 1C172TM propeller. · 150D, 150E, 150F
2022-07-12SA1043SW · Installation of Lycoming O-360-A1A or O-360-A3A engine and Hartzell Constant-Speed Propeller Model HC-C2YK-1B/7666A-2. · 177
2022-07-12SA1008SW · Installation of Lycoming O-360-A1A or O-360-A3A engine and Sensenich M76EM8S5-0-60 propeller. · 177
2022-07-12SA1052SW · Installation of Lycoming O-320-E2D engine according to STC SA1034SW on floatplane version. · 150H, 150L, 150K

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.