EWIS Target Group 3 (Basic) (E-learning)

Technical operations & MRO · Safety · E-learning · Certificate: AM&TS

Training information

  • Length of training: 6-8 hours
  • Language: English
  • Certification: AM&TS (EASA Part-147 NL.147.7174) Certificate of course completion (Valid for 2 years) 
  • Previous knowledge required: Participants should have clear understanding of aircraft or component maintenance activities. Recommended level is Intermediate. The recommended level of language proficiency is ICAO Operational Level 4 for courses in English or the equivalent level for other languages.
  • Price: €75 (VAT excluded)

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This training is a partnership between AM&TS and Aviato Academy.

Target Audience

This training is aimed to every qualified person who is part of Target group 3 – Qualified staff performing electrical/avionic engineering on in-service aeroplane.


This course is developed with EASA AMC 20-22, Appendix A, B and C.

The course is intended for Qualified staff performing electrical/avionic engineering on in-service aeroplane (Target group 3) and complies with AMC 20-22, AMC 145.A.30(e) and Part-145.A.35(d), requirements.

This course provides the students with all the key information required to satisfy the regulation specific to their target group. The course is designed to become introduced, to refresh and/or reinforce the knowledge and skills concerning all aspects of the Electrical Wiring Interconnection System (EWIS).

Training slides are followed up with question slides. These question slides are included in the training to test your knowledge, skills and attitude towards Human Factors. At the end of the course you will receive a final examination. For both you need to pass with a score of 75% or more.

Course content

  • Know or demonstrate the construction and navigation of the applicable aeroplane wiring system overhaul or wiring practices manual. 
  • Know the contamination sources, materials, cleaning and protection procedures. 
  • Know or demonstrate the correct identification of different wire types, their inspection criteria, and damage tolerance, repair and preventative maintenance procedures. 
  • Know or demonstrate the procedures to identify, inspect and find the correct repair for typical types of connective devices found on the applicable aeroplane.

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