EASA Design Organisation

AeroFEM is certified as a Design Organization by EASA (EASA.21J.644). We are authorized to develop and approve minor modifications (minor changes), major changes (STC) and repairs (minor repairs) on aircraft.

The DO approval authorizes us to act within the following aircraft categories:

  • Very Light Aircraft / Light Sport Aircraft (CS-VLA / CS-LSA)
  • Sailplanes / Powered Sailplanes (CS-22)
  • Small Aeroplanes (CS-23)
  • Lage Aeroplanes (CS-25)
  • Very Light Rotorcraft (CS-VLR)
  • Small Rotorcraft (CS-27)
  • Large Rotorcraft (CS-29)
  • Unmanned Aerial Vehicles (CS-UAV)

Our expertise focuses on:

  • Structures (Airframe)
  • Mechanical Systems (incl. hydro-mechanical)
  • Integration of Propulsion and Fuel Systems
  • External Sling Load Systems (Heavy Loads, Human External Cargo)
  • Interior Components & Cabin Equipment (MEDEVAC, Galleys, etc.)
  • Cargo Systems

AeroFEM is also authorized to plan and conduct flight tests under EASA supervision (Flight Conditions application to EASA, Permit to Fly to be issued by EASA).

Thomas Bissig

Contact us for more information

+41 41 619 85 05

Thomas Bissig
HoOA, Dipl. Masch.-Ing. FH

Approval Certificate und Terms of Approval (DOA)

Technical Publications

Download technical documentation for Supplemental Type Certificates (STC), Minor Changes and Repairs

Our changes

Product Name Aircraft Type Certification
H130 Bubble Window "Type Air Zermatt" EC 130 B4/T2 Major Change (STC) More information
More information

Our repairs

Product Name Aircraft Type Certification
Bulkhead STA 49.6 Piper PA-31T, Cheyenne II Minor Repair More information
Engine Nacelle Bulkhead Piper PA-31T, Cheyenne II Minor Repair More information