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

Aeronautical Testing Service

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Cessna 340. FAA spelling: Aeronautical Testing Service.

Approved modifications 2 · newest first

Cessna 340 1Cessna 335 1
1993-06-21SA5198NM · Installation of vortex gnerators on the wing and vertical tail and a5% increase in takeoff weight. · 340, 335, 340A
1988-04-15SA4301NM · Installation of a one to nine passenger configuration. · DHC-3

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.