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

Ders Group Svc LLC

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Cessna 210 Centurion. FAA spelling: DERS Group Svc LLC.

Approved modifications 2 · newest first

Cessna 210 Centurion 1Cessna 207 Skywagon 207 1Cessna 206 Stationair 1
2019-07-31SE03415CH · The turbo-normalization of Continental Motors engine models IO-520-A, -F, -J, and -L, TSIO-520-C, -G, -H, -M, and... · TSIO-520-C, TSIO-520-G, TSIO-520-H
2019-07-31SE03416CH · Installation of a Continental turbo normalized engine · 206, 207, 210

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.