DOA REF. EASA 21J.401
Designing aviation with safety, precision & compliance.
Engineering and design solutions under EASA regulations for certified aircraft modifications, including STCs, major and minor changes.
DOA AUTHORITY
Design Organization Approval
Mach Technical Design S.L. holds an EASA Part 21J Design Organisation Approval issued under Commission Regulation (EU) No 748/2012.
Our approval grants the organisation the privilege to develop and approve design data within the scope of our authorised capabilities, ensuring full compliance with applicable airworthiness requirements.
Operating under DOA reference EASA.21J.401, we provide certified engineering solutions for rotorcraft modifications, repairs and airworthiness support across the European regulatory framework.
DOA REFERENCE
EASA 21J.401
AUTHORITY
EASA
REGULATION
Part 21, Subpart J
REGULATION NO.
E(EU) 748/2012
TECHNICAL DISCIPLINES
Specialized Engineering
Avionics
- Communication
- Navigation
- Recording
- Surveillance
Electrical Systems
- External Lighting Systems
Structures
- Fuselage
- External Equipment Support
ENGINEERING SERVICES
Coomprehensive Design & Certification
Our engineering capabilities span the full lifecycle of aviation design: from initial concept through certification, continued airworthiness support, and regulatory liaison. Each service is performed under the authority and within the scope of our DOA.
STC Development
Major & Minor Changes
Permit to Fly Support
Repair Design
Regulatory Liaison
Airworthiness Engineering
SCOPE OF APPROVAL
Approved Design Capabilities
STC
Supplemental Type Certificates
MRD
Major Repair Design
MMC
Minor Modifications & Changes
TCD
Technical Compliance Documentation
WHY CHOOSE MACH
We combine regulatory approval, engineering expertise, and operational safety to deliver certified design solutions for rotorcraft modifications.
TRUSTED COMPLIANCE
Certified Design Under EASA:
Part 21 - Subpart J
Mach holds a Design Organisation Approval (DOA) to perform aircraft design changes, classify STCs, and approve major and minor modifications under EASA.
DESIGN ASSURANCE SYSTEM
Quality & Design Assurance
Our Design Assurance System (DAS) is established in accordance with 21.A.239, providing the framework to ensure all design activities comply with applicable airworthiness requirements and organisational procedures.