GDC Technics’ Sister Company GDC Engineering has successfully passed both EN9100 and EASA 21J Audits with an unlimited scope of approval to maintain our Design Organization Approval status, allowing in-house European OEM approval capabilities for both TC rated aircraft and STC’s alike. GDC Engineering is one of only seven companies in Europe able to hold such an approval whilst also holding an ODA, which provides strategic time and cost savings for our clientele.