Part 21 J – Design Organisation Approval

2-day course | Classroom, Virtual & In-company training
  • Classroom courses in London Gatwick and Singapore
  • Delivered by experienced UK CAA inspectors
  • Learn how to prepare for a Part 21 Subpart J on-site assessment
  • Master how to maintain a Part 21 Subpart J approval compliance
Start Date End Date Venue Price (Excl. VAT) Availability Book
11/11/2024 12/11/2024 Online £910.00 5 places remaining Book
18/02/2025 19/02/2025 London Gatwick £910.00 More than 5 places Book
What is Part 21 Subpart J – Design Organisation Approval?

Part 21 Subpart J details the elements required of a design organisation in order to hold a CAA/EASA Design Organisation Approval (DOA). It outlines the requirements and procedures for the design, production, and approval of parts, appliances, and materials used in aviation. Subpart J sets forth the responsibilities of manufacturers, suppliers, and applicants seeking approval for the production of aviation products, including the need to demonstrate compliance with applicable design and airworthiness standards. The regulation encompasses aspects such as design data, quality systems, production control, and conformity assessment procedures. Compliance with Part 21 Subpart J ensures that aviation components meet the necessary safety and performance standards, contributing to the overall airworthiness of aircraft and the safety of flight operations.

Course Overview

This course provides delegates with an understanding of the UK Civil Aviation Authority (CAA) and the European Aviation Safety Agency (EASA) Part 21 Subpart J and the associated topics concerning the changes to Type Design, Supplementary Type Certificates (STC) (modifications) and repairs.

Our Singapore courses are delivered in cooperation with the Singapore Aviation Academy. Please visit the SAA website for upcoming dates.

This course is suitable for individuals responsible for compliance or certification within a design organisation. It is also suitable for those individuals responsible for the oversight of design organisations, either of subcontractors or from a regulatory perspective.

This training course will include the following topics:

  • CAA & EASA Relationship
  • Part 21 and the other Subparts
  • Part 21 Subpart J Design Organisation Approvals (DOAs) change classification and changed product rule principles
  • Operational Suitability Data
  • Level of Involvement concepts
  • STC procedures
  • Repair approval procedures
  • Equipment approval procedures
  • UKTSO / ETSO and Equipment Software overview
  • When an EASA/CAA Form 1 may not be required
  • CAA & EASA DOAs Surveillance process

By the end of the course delegates will demonstrate understanding of the following through presentations and group discussion:

  • How their organisation should comply with the regulation
  • Process used by the Civil Aviation Authority (CAA) to carry out continued surveillance to Part 21 Subpart J
  • Process used by the European Union Aviation Safety Agency (EASA) to carry out continued surveillance to Part 21 Subpart J
  • How to prepare an organisation for an efficient and effective on-site assessment and surveillance
  • How to maintain a Part 21 Subpart J approval ensuring compliance at all time

It would be advantageous for delegates to be familiar with, or have experience of working in, a design-related organisation.

Meet your Instructors

Ian MacLaren

EASA Part 21 G – Production Organisation Approval
EASA Part 21 J – Design Organisation Approval
EASA Part M Continuing Airworthiness
Electrical Wiring Interconnection Systems (EWIS)

Ian has over 35 years of experience in the industry. He is an Airworthiness specialist at the UK CAA ( including ASSI) including British Aerospace, and now BAE Systems. Ian has previously worked as an Avionics design certification specialist on large aircraft and a Part 145 and Part M specialist. Ian is currently delivering our Initial Airworthiness and Continuing Airworthiness training courses and instructing training addressing the airworthiness aspects of Specific Approvals.


Additional Information

Course delivery methods

We offer two different ways to attend this course:

  • Face-to-Face Classroom Course: Embrace the traditional learning method by attending our physical training venue. Benefit from direct interaction with our instructors and fellow participants, creating an immersive and hands-on learning experience. To book a classroom course, please check the booking table at the top of this page and select your preferred training venue location.
  • Instructor-Led Virtual Course: Enjoy the flexibility of attending this training remotely from your home or office with our live virtual course. Engage in interactive learning from anywhere in the world. We usually use WebEx or Zoom for our virtual courses. To attend this course virtually, look for the ‘online’ venue option in the booking table above.

Please note that course durations may vary slightly between our face-to-face and virtual deliveries. Please refer to the start and end date of your chosen course.

Our goal is to offer flexible, effective and convenient course delivery methods that suit your preferences and learning needs. Please choose the option that works best for you!

If you can’t see a classroom or virtual option, we likely haven’t released the next set of dates. Please get in touch to find out when we’ll announce the new dates, and we’ll be sure to keep you informed once they are available or even add you to our waiting list.

Further reading

EASA Part 21 Design Organisation Approvals
A Design Organisation Approval is the recognition that a Design Organisation complies with the requirements of Part 21 Subpart J.

In-company delivery

We can also tailor this training course to suit your organisation’s training requirements. These bespoke training packages can be delivered at your organisation’s location – almost anywhere, worldwide. Please Contact us for more information and to discuss your requirements.

VAT information

Please ensure you have your company VAT number available when booking. For additional information regarding VAT please click here.


To help make your decision about booking training with CAAi, we have put together a list of frequently asked questions.

If your question isn’t answered, please get in touch and speak to a member of our training team.

Questions and Answers

Course Reviews

Other courses you might be interested in

Part 21 G Production Organisation Approval

Production organisations need to be able to demonstrate and maintain compliance with Part 21 Subpart G. In this course, you will find out how to do that. Your UK CAA expert instructors will provide an overview of EASA/UK CAA Part 21 Subpart G and associated Acceptable Means of Compliance (AMC) and Guidance Material (GM).

Part CAMO including Part M

This course provides delegates with an introduction to the continuing airworthiness regulations, including the EASA and UK CAA regulations, now the UK has left the EU.  It provides a review of the Part CAMO Continuing airworthiness organisation requirements and Part M continuing airworthiness standards

Let’s talk

If you’d like to speak with us about your training requirements,
our friendly team are here to help.
+44 (0)330 022 4401
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