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

Twin Otter Stc Holdings LLC

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Dehavilland DHC-6. FAA spelling: Twin Otter STC Holdings LLC.

Approved modifications 2 · newest first

Dehavilland DHC-6 2
2026-08-03SA1841NM · Installation of larger windows and the lowering of the seats. · DHC-6-1, DHC-6-100, DHC-6-200
2026-05-04SA7738SW · Installation of a freon air conditioning system. · DHC-6-100, DHC-6-200, DHC-6-300

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.