Engineering & Certification
Minor changes and STCs
under EASA 21J.361 DOA

Services for Airlines, MROs and Lessors

Inter-Informatics holds Design Organization Approval (DOA) EASA.21J.361 with extensive scope, and is entitled to design and implement STCs, minor changes and repairs.


Our Offer

We offer a full range of services, from concept to certification.

STCs and minor change approvals
Technical and certification consultations
Conceptual design & feasibility studies
Testing guidance and management
Repair documentation and approval


Why to Choose Us

Large Team

120+ experienced aerospace engineers with immense record of finished projects

 Chain of Qualified Suppliers

Research & Testing Institutes, Part 21 G Production Organisations, Part 145 Maintenance Organisations 

& Fast Response 

Minor changes as well as more complex EASA STC process

Examples of Delivered Changes

  • Cabin layout reconfiguration (including VIP cabin)
  • Monument replacement and modification
  • PAX Seat replacement and modification
  • Cabin system retrofit
  • Cabin electrical harness modification
  • Emergency equipment modification
  • Floor covering change
  • Sidewall + ceiling panel modification
  • Seat cover replacement
  • Curtain and carpet replacement
  • IFE modification
  • New partition installation
  • Placard change
  • ELT installation and changes
  • Portable oxygen installation
  • Livery


Scope of Approval

See the Design Organization Approval in PDF > 

Changes to type design (STC or Minor changes) and repairs
Categories of products: Aeroplanes and Rotorcraft

Structure Secondary structure and simple modifications of primary structure components
Environmental Systems Installation of components of the systems and design of tubing and similar components
Electrical Systems Electrical subsystems integration and installation and electrical harness design and installation
Cabin Interiors No limitations
Galleys or Other Interiors Equipment

No limitations

Installation of Avionics Equipment No limitations
Hydro-mechanical Systems Installation of components of the systems and design of piping and similar components
Power-plant/ Fuel Systems Fuel system installation of components and design of tubing and similar components
Non-critical Engine Parts No limitations


Serial production
of composite parts

Aircraft component maintenance services

Maintenance, repair and overhaul (MRO) services

Maintenance, repair and overhaul (MRO) services

Maintenance, repair and overhaul (MRO) services

Maintenance, repair and overhaul (MRO) services












Selected Customers