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

Jet Aviation Flugzeugwartung GMBH

Named as the FAA publishes it on its approvals.

Holds 4 approved modifications, most of them for the Cessna 650 Citation III, VI and VII. FAA spelling: Jet Aviation Flugzeugwartung GmbH.

Approved modifications 4 · newest first

2013-03-01ST03256NY · Honeywell MARK VII Enhanced Ground Proximity Warning System (EGPWS) installation · 650
2012-11-21ST03216NY · Installation of L3 Communications FA2100 Cockpit Voice Recorder (CVR) System · 650
2012-11-21ST03217NY · Installation of P-RNAV compliance on the installed Honeywell GNS-XLS Flight Management System · 650
2012-02-17ST03064NY · Installation of this Cabin Reconfiguration · BD-700-1A11

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.