Specialty Design & Engineering

Where innovation takes flight.

As a Transport Canada Design Approval Organization (DAO), Chorus’ Voyageur Aerotech subsidiary specializes in providing in-house design and certification services to deliver customer requirements. This includes Repair Design Approvals (RDAs) and Supplemental Type Certificate (STC) approvals for aircraft modifications, reconfigurations, and part replacements.

Our engineers coordinate all design approval requirements for delegations including structures, systems, avionics, interiors, electrical, and flight testing. The team becomes fully engaged in all phases of MRO activities, from technical support for general maintenance activities to the creation of custom designs, requiring airworthiness approval, including Supplemental Type Certificate (STC) approvals.

We work closely with clients and clients’ regulatory authorities to understand their needs, obtain the appropriate approvals, and ensure seamless transition from concept to certification to operation.

Specialty Design & Engineering Capabilities


Includes Supplemental Type Certificates (STCs), Part Design Approvals (PDAs), and Repair Design Approvals (RDAs). Comprehensive certification guidance, such as test plans (ground and flight), and burn certifications.

Technical Support

Includes damage assessments, component and airframe repairability, part interchangeability, interpretation of product service manuals, aircraft records review / assessment, liaising with original equipment manufacturers (OEM), and manufacturing support.

Structural Design

Core competencies include comprehensive structural and interior designs, conventional techniques for static and fatigue analysis, reverse engineering load computations, and strain gauge installation / recording.

System Design

Skillsets include interconnection diagrams, systems analysis and system safety assessments, electrical wiring interconnect system (EWIS) reports and instructions for continued airworthiness (ICAs), and regulatory compliance.

Operational Documentation

Air carrier operational assistance services such as flight manual supplements / maintenance manual supplements, weight and balance assessments, and electrical load analysis.

Project Management

Assistance in practical applications including project management / integration, interpretation regulatory requirements with respect to type of repairs and modifications, import / export repairs and modifications, and hands-on experience with fabrication and repair processes.

Voyageur aerotech in flight deck


  • Transport Canada Design Approval Organization (DAO)

Supplemental Type Certificates

  • Dash 8-100 Package Freighter (PF) Conversion
  • Dash 8-100/200/300 AeroVue Glass Cockpit (in development)
  • Dash 8-100/200/300 Long Range Fuel Tank Installation
  • Dash 8-300 Supplementary Baggage Bin Installation
  • Dash 8-400 Supplementary Baggage Bin Installation
  • Dash 8 Aircraft Survivability Equipment, Missile Counter Measures ALE-47/AAR-47 and Cockpit Ballistic Protection

Specialty Design & Engineering Business