Electrical Wiring Interconnection Systems (EWIS)

2-day course | Classroom, Virtual & In-company training
  • Classroom courses in London Gatwick
  • Review the technical aspects of typical EWIS installations
  • Master enhanced EWIS inspection techniques
Start Date End Date Venue Price (Excl. VAT) Availability Book
08/10/2024 09/10/2024 London Gatwick £860.00 More than 5 places Book
What are Electrical Wiring Interconnection Systems?

EWIS stands for Electrical Wiring Interconnection System, and in the context of aviation, it refers to a set of regulations and guidelines that govern the design, installation, inspection, and maintenance of electrical wiring systems in aircraft. The purpose of EWIS is to ensure the continued safe operation of an aircraft by addressing the potential risks associated with aging wiring systems. These regulations encompass various aspects, including wire selection, routing, separation, protection, bonding, and maintenance practices. Compliance with EWIS requirements helps prevent electrical failures, arcing, and wire degradation, which can pose serious safety hazards. By implementing proper maintenance and inspection procedures outlined in EWIS, aviation stakeholders can effectively manage and mitigate the risks associated with aircraft electrical wiring systems, ensuring the ongoing airworthiness and safety of the aircraft.

Course Overview

This course provides delegates with an overview of the development of enhanced aeroplane EWIS maintenance and the Enhanced Zonal Analysis Procedure.

Delegates will also learn about the technical aspects of typical EWIS installations, supporting inspection techniques and an introduction to AMC 20-22 Aeroplane EWIS training programmes.

This course is suitable for individuals involved in EWIS, either in a regulatory oversight capacity, or within industry managing training on EWIS.

This training course will include the following topics:

  • Safe handling of Aeroplane Electrical Systems
  • Line replaceable units (LRU)
  • Tooling
  • Troubleshooting procedures and electrical measurement
  • Construction and navigation of typical aeroplane wiring system overhaul or wiring practices manuals
  • Types of inspection
  • Human factors in inspections
  • Zonal areas and typical damage
  • Contamination sources, materials, cleaning and protection procedures
  • Correct identification of different wire types
  • Inspection criteria and damage tolerance
  • Repair and preventative maintenance procedures
  • Procedures to identify, inspect and find the correct repair for common types of connective devices found on typical aeroplanes
  • Procedures for replacement of all parts of common types of connective devices found on typical aeroplanes

At the end of this course, the participants will be able to:

  • Understand the basis of enhanced aeroplane EWIS maintenance
  • Understand the philosophies behind the Enhanced Zonal Analysis Procedure
  • Understand the broad technical aspects of enhanced EWIS inspection techniques
  • Demonstrate an overall knowledge of the elements needed in an effective EWIS training programme
  • Understand the regulatory expectations for effective delivery of initial and recurrent EWIS training in an approved organisation under their regulatory oversight

Delegates would benefit from having had exposure to, or experience of approved maintenance programmes, aircraft maintenance manuals, aircraft wiring diagrams, and other such instructions for continuing airworthiness.

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.

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

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Let’s talk

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+44 (0)330 022 4401
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