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EWIS TG 1, 2 and 3 - Continuation Training Target Group 1, 2 and 3

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As bad as it is, lessons are learned with every incident or accident, big or small. The cause of it is analyzed and procedures are drawn up or changed on the basis of this. One of the results of such an analysis can be that there is a need for training, to create or increase awareness for a certain matter for example. One such training is EWIS.

Following EWIS training is set mandatory by the aviation authorities. If you don’t follow this course, you won’t be allowed to practice your passion: working on the Aircraft.


This continuation training is custom made to meet the requirements given by the aviation authorities for Target Group 1, 2 and 3. 

  • Target group 1: Qualified staff performing EWIS maintenance
  • Target Group 2: Qualified staff performing maintenance inspections on EWIS.
  • Target group 3: Qualified staff performing electrical/avionic engineering on in-service aeroplanes.


The training consist of the following modules:

  • Module A: General EWIS Practices.
  • Module B: Wiring Practices Documentation.
  • Module C: Inspections.
  • Module D: Housekeeping.
  • Module E: Wire.
  • Module F: Connective Devices.


Module A: General EWIS Practices 

Learning Objectives: 

  • Know the safety procedures of normal and non-normal maintenance procedures so that the person can protect himself/herself and the aeroplane.
  • Recognize ESDS equipment and demonstrate standard anti-static procedures so that no damage occurs to that equipment.
  • Demonstrate the correct use of hand tools including specialized and automated tools and equipment.
  • Verify the calibration of electrical measuring instruments, tools and equipment so that correct maintenance procedures may be carried out.
  • Demonstrate the process and procedures to successfully use the troubleshooting procedures and charts of current aeroplane faults and know re-occurring problems causing “no fault found” on removed LRU.
  • Demonstrate the correct use of electrical meters for measuring voltage, current, resistance, continuity, insulation and short to ground.
  • Know the removal and replacement techniques so that no damage will occur to the LRU or aeroplane connector.



Module B: Wiring Practices Documentation

Learning Objectives:

  • Know the applicable sub-chapters and section to follow during normal and non- normal electrical maintenance procedures.
  • Demonstrate the use of the cross-reference index, chapter table of contents, and subject tables of contents so as to find specific material within each sub-chapter and section.
  • Demonstrate the use of the associated tables for replacement of wire, connective devices and contacts, and associated components, including approved replacements.
  • Demonstrate the use of the wiring diagram manual.
  • Demonstrate the use of other documentation.


Module C: Inspections

Learning Objectives:

  • Know the different types of inspections: general visual inspection (GVI), detailed inspection (DET), zonal inspection and enhanced zonal analysis procedure (EZAP).
  • Know the criteria and standards of inspection so that the person knows which tools are used to ensure inspection procedures and standards are achieved, which leads to all defects being found.
  • Know the effects of fatigue and complacency during inspection and how to combat these effects (human factors).
  • Know the specific zonal inspection requirements related to system affiliation and environmental conditions.
  • Recognize typical wiring system damage, such as hot gas, fluid contamination, external mechanically induced damage, chafing, corrosion, signs of overheating of wire, wire bundles, connective and control device assemblies.


Module D: Housekeeping

Learning Objectives:

  • Recognize external contamination and other damage due to external environmental conditions.
  • Know the aeroplane internal contamination sources so that inspection processes can be effectively carried out and contamination damage easily recognized.
  • Recognize other possible contamination sources.
  • Know the planning procedures to be followed, on EWIS areas in different parts of the aeroplane.
  • Know the protection procedures and processes to protect the EWIS during maintenance and repair.
  • Know the process of cleaning wiring systems during maintenance and repair.


Module E: Wire

Learning Objectives:

  • Demonstrate the procedure used to identify specific wire types using the aeroplane manuals.
  • Know from approved data different insulation types and their relative qualities.
  • Know the inspection criteria for wire and wire bundles.
  • Know the standard installation practices for wire and wire bundles.
  • Know typical damage that can be found.
  • Demonstrate the repair procedures for typical damage found.
  • Demonstrate the procedures to fitting differing types of sleeving.
  • Know the procedures for termination and storage of unused wires.
  • Know the correct installation practices for electrical bonds and grounds.


Module F: Connective Devices

Learning Objectives:

  • Know the general types and positive identification of connective devices.
  • Know the various safety procedures, cautions and warnings prior to inspection.
  • Know the relevant visual inspection procedures for each type of connector so that any internal or external damage can be found.
  • Recognize typical external and internal damage to the connector.
  • Demonstrate where to find the relevant repair schemes from chapter 20 for connector repair.


Course Duration:

  • 3 hours.


Training Type:

  • Interactive;
  • Video Presentation;
  • Voice Over.

Methods and Conception:

  • Everyone can manage the learning pace and learning duration depending on each person possibilities.
  • You can choose perfect timing and comfortable place with internet access.



  • Technical English.


Minimum Requirements:

  • Internet access;
  • Able to read technical aviation English language.


During this advanced online training course, interactive questions are asked, seeking that students better understand course material.


On the end of this training course (100% completion of the course)  there will be a "multiple choice questions examination". 

Pass mark – 75% or more. 
One (1) re-examination possible after failing the first attempt (if both attempts failed, full course has to be completed again).



Upon successful completion of this advanced online training course (75% or more), participants will receive their certificate online and can be downloaded.

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This online training course aims to provide acceptable means of compliance to comply with training obligations as required in paragraphs 21.A.145 and 21.A.245 of Part-21, 145.A.30 and 145.A.35 of Part-145 and M.A.706 of Part-M with respect to EWIS.


This online training course is dedicated, but not limited to:

  • Personnel involved in to the aviation maintenance;
  • Engineering and training personnel in accordance with Part-145, Part-M and Part-147;
  • Also beneficial for all personnel involved in any aviation activities.
  • Target group 1 – Performing electrical wiring maintenance EWIS procedures,

  • Target group 2 – qualified staff performing maintenance inspections on wiring systems in accordance with AMC 20-22, AMC 145.A.30(e) and Part-145.A.35(d), requirements:

    Repairing of EWIS procedures, Inspecting of EWIS, identified as (i.a.w. Appendix A to the AMC 20-22)
    Qualified staff performing EWIS maintenance; Related to EWIS performance in any other way.

  • Target group 3 – qualified staff performing electrical / avionic engineering on in-service aero planes.



To comply and  satisfy the requirements of Annex III to ED Decision 2008/007/R of 29/08/2008 AMC20-22 and help improve wiring and maintenance practices throughout the industry. 


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Sign up for: EWIS TG 1, 2 and 3 - Continuation Training