EASA Part 21J.481 Design Organization Approval

Since 2011, ADSE is a certified by the European Aviation Safety Authority (EASA) as a Design Organization according EASA.21J.481. With that important and internationally recognized certificate, ADSE has the authority to independently assess and approve modifications to aircraft. Our approval is applicable to:

  • CS 25 and 23: Large and small aeroplanes 
  • CS 29 and 27: Large and small rotorcraft

doa_certificaat_crop_klein.pngApplications of our ADSE DOA

  • Approval of modifications and repairs
  • Certification of type designs
  • Contributions to large modifications like STC’s
  • Collaboration with other design organizations through a Design Organization Interface Document (DOID)

Our technical fields of expertise

  • Avionics
  • Installation of avionics equipment
  • Structure
  • Aircraft performance
  • Electrical systems
  • Hydro mechanical systems
  • Environmental systems
  • Cabin interiors
  • Galleys or other interiors equipment

Our Compliance Verification Engineers (CVE)

  • Cabin Safety
  • Fire Safety
  • Electrical Systems
  • Avionics
  • Structures
  • Aircraft Performance
  • Aerodynamics and Flight Handling
  • Environmental Control Systems, Ice and Rain Protection
  • Hydro-mechanical systems 

Request for EASA approval of a modification or repair

To request development and/or EASA approval of a modification or repair, please refer to section Modifications and repairs.