Regulatory Framework & design assurance
Compliance & Regulatory
This section provides a comprehensive overview of our regulatory standing, the scope and limitations of our approval, our Design Assurance System, and the applicable regulatory framework governing our activities.
DOA AUTHORITY
Design Organisation Approval Details
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.
SCOPE OF APPROVAL
Approved Design Capabilities
The terms of approval of MACH Technical Design S.L. Define the scope and limitations within which the organisation is authorised to exercise its design approval privileges.
STC
Supplemental Type Certificates
Design and approval of major changes to type-certificated products through Supplemental Type Certificates (STCs).
MMC
Minor Modifications & Changes
Classification, design, and approval of minor changes and minor repairs under the authority of the DOA.
MRD
Major Repair Design
Engineering design of major repairs for aircraft structures, systems, and components in compliance with applicable certification specifications.
TCD
Technical Compliance Documentation
Preparation of compliance demonstration documentation, including substantiation reports, analysis, and test evidence.
LIMITATIONS
Conditions & Restrictions
The following limitations apply to te design activities performed under the DOA.
Design activities are limited to the categories and product types specified in the Terms of Approval.
Direct approval privileges are exercised only within the scope and conditions established by EASA.
Activities outside the approved scope require prior EASA coordination and, where applicable, scope extension.
The organisation shall not approve designs that exceed the competence of its qualified staff as assessed in accordance with 21.A.245.
DESIGN ASSURANCE SYSTEM
DAS per 21.A.239
The Design Assurance System (DAS) of MACH Technical Design S.L. is established in accordance with the requirements of 21.A.239 and associated implementing rules. The DAS provides the organisational framework for ensuring that all design activities are conducted in compliance with the applicable airworthiness requirements and the organisation's procedures.
The system encompasses design verification and independent checking processes, configuration management, interface management with production and continuing airworthiness organisations, and a comprehensive corrective action and feedback system.
KEY DAS ELEMENTS
Design Verification
Independent Checking
Configuration Management
Interface Management
Corrective Actions
Internal Auditing
Competence Management
REGULATORY FRAMEWORK
Applicable Regulations
Reg. (EU) 748/2012
Commission Regulation (EU) No 748/2012
Laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances. Part 21 establishes the procedures for DOA approval and privileges.
AMC / GM
Acceptable Means of Compliance
EASA-issued AMC and GM providing acceptable methods, techniques, and practices for demonstrating compliance with Part 21, Subpart J requirements.
CS-23 / CS-25
Certification Specifications
EASA Certification Specifications applicable to normal, utility, aerobatic, and commuter category aeroplanes (CS-23), and large aeroplanes (CS-25), forming the airworthiness basis for design activities.
EASA Part-M
Continuing Airworthiness Requirements
Regulation defining the requirements for continuing airworthiness management, relevant to the interface between design and maintenance organisations.