V-plane engineering GmbH is an aviation engineering firm with EASA approval to make changes to all types of aircraft under EASA.21J.323, including STCs and minor changes for large and small aircraft. They have 45 experts experienced on projects from 1 to 400 seats who can provide services like STC and repair approvals, certification plans, and Design Organization Approval support. They encourage contacting Henryk Bork, Bengt Sjödahl, or James J. Murray for assistance.