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

Stc Twenty One, LTD.

Named as the FAA publishes it on its approvals.

Holds 6 approved modifications, most of them for the Boeing 757. FAA spelling: STC Twenty One, Ltd..

Approved modifications 6 · newest first

Boeing 757 2Boeing 737 2Bombardier BD-700 Global Express, 5000 and 6000 1Boeing 767 1
2018-11-23ST04277NY · Installation of Air Conditioning Filter · 757-200 Series, 757-300 Series
2018-10-29ST04241NY · Installation of a custom corporate interior · 757-200 Series
2017-03-29ST03880NY · Installation of Corporate VIP Interior · 737-700 Series
2016-06-28ST03718NY · Introduction of upgraded IFE, Cabin lighting and universal outlets · BD-700-1A10
2015-10-21ST03574NY · Installation of antenna provisions · 767-200 Series, 767-300 Series
2015-10-06ST03560NY · Activation of Controller-Pilot Data-Link Communications (CPDLC) capability on Spectralux "D-LINK" ACARS VDL Mode\n2... · 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.