Electrical Wiring Interconnection Systems (EWIS): EASA Part 145 Requirements
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Electrical Wiring Interconnection Systems (EWIS): EASA Part-145 Requirements

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Full course description

Electrical Wiring Interconnection Systems (EWIS): EASA Part 145 Requirements

Course Overview

This course provides a comprehensive understanding of Electrical Wiring Interconnection Systems (EWIS) within the EASA Part 145 regulatory framework. It covers regulatory requirements, safety practices, inspection techniques, wiring standards, and maintenance procedures to ensure continued airworthiness and safe aircraft operations.

Abbreviations and Acronyms

Module 1 — Introduction to EWIS

  • 1.1 Background of EWIS
  • 1.2 Industry Awareness and Lessons Learned
  • 1.3 Evolution of EWIS
  • 1.4 What is EWIS? - Definition and Scope
  • 1.5 Elements of an Effective EWIS Program
  • 1.6 Regulatory Recommendations and Requirements

Module 2 — EASA Regulatory Framework for EWIS

  • 2.1 Introduction to EASA
    • Overview of the European Union Aviation Safety Agency (EASA)
    • Role and responsibilities
  • 2.2 EASA Regulatory Framework
    • Basic Regulations
    • Regulation (EC) No 216/2008 - Former Basic Regulation
    • Regulation (EU) 2018/1139 - Current Basic Regulation (Replacing 216/2008)
    • Implementing Regulations
    • Regulation (EU) No 748/2012 - Initial Airworthiness (Part-21)
    • Regulation (EU) No 1321/2014 - Continuing Airworthiness (Part-M, Part-145, etc.)
  • 2.3 EASA Regulations and Guidance Material on EWIS
    • Certification Specifications
    • CS-25 Subpart H : Defines design and certification requirements for EWIS on large aeroplanes.
    • EASA Acceptable Means of Compliance (AMC)
    • AMC 20-21 - Airworthiness and Continued Airworthiness of Electrical Wiring Interconnection Systems (EWIS)
    • AMC 20-22 - EWIS Training Program
    • AMC 20-23 - Development of Electrical Standard Wiring Practices Documentation
    • Executive Director Decision
    • Annex III to ED Decision 2008/007/R
  • 2.4 EWIS Requirements Within the EASA Continuing Airworthiness System
    • PART-21 : Design and Production Organisation Requirements
    • PART-145 : Approved Maintenance Organisations
    • PART-M : Continuing Airworthiness Management

Module 3 — General Electrical Wiring Interconnection System Practices

  • 3.1 Safety practices
  • 3.2 ESDS Device Handling and Protection
  • 3.3 Tools, special tools and equipment
  • 3.4 Verify Calibration/Certification of Instruments, Tools & Equipment
  • 3.5 Required wiring checks using the Troubleshooting Procedures and charts
  • 3.6 Measurement & Troubleshooting Using Meters
  • 3.7 LRU Replacement - General Practices

Module 4 — Wiring Practices Documentation

  • 4.1 Standard wiring practices manual (SWPM) structure/overview
  • 4.2 SWPM Cross-Reference Index
  • 4.3 SWPM Important Data & Tables
  • 4.4 Wiring Diagram Manuals
  • 4.5 Other Documentation as Applicable

Module 5 — Inspection

  • 5.1 Types of inspections
  • 5.2 Criteria and standards
  • 5.3 Human Factors in inspection
  • 5.4 Zonal Areas of Inspection
  • 5.5 Electrical wiring interconnection systems (EWIS) damage

Module 6 — Housekeeping

  • 6.1 Aeroplane External Contamination Sources
  • 6.2 Aeroplane Internal Contamination Sources
  • 6.3 Other Contamination Sources
  • 6.4 Contamination Protection Planning
  • 6.5 Protection during Aero plane Maintenance & Repair
  • 6.6 Cleaning Processes

Module 7 — Wires

  • 7.1 Wire Identification, Type & Construction
  • 7.2 Insulation Qualities and Damage Limits
  • 7.3 Inspection criteria and standards for wire and wire bundles
  • 7.4 Wire Bundle Installation Practices
  • 7.5 Typical Damage and Areas Found (Aero plane specific)
  • 7.6 Maintenance and Repair Procedures
  • 7.7 Sleeving
  • 7.8 Unused Wires - Termination & Storage
  • 7.9 Electrical Bonding & Grounds

Module 8 — Connective devices

  • 8.1 General Connector Types & Identification
  • 8.2 Cautions & Protections
  • 8.3 Visual Inspection Procedures
  • 8.4 Typical Damage found
  • 8.5 Repair Procedures

Module 9 — Connective Devices Repair

  • 9.1 Circular Connectors
  • 9.2 Rectangular Connectors
  • 9.3 Terminal Block - Modular
  • 9.4 Terminal Block - Non-Modular
  • 9.5 Grounding Modules
  • 9.6 Pressure Seals

Module 10 — Case studies

  • 10.1 Case Studies on Aircraft Electrical and Wiring-Related Failures
    • TWA Flight 800 (1996)
    • Swissair Flight 111 (1998)
    • Air Canada Flight 797 (1983)

Who Should Attend

  • Aircraft Maintenance Engineers and Technicians
  • Part-145 Maintenance Organisation Personnel
  • Quality and Safety Personnel
  • CAMO Staff
  • Aviation Students and Trainees

Final Assessment and Certification

Upon completion, participants will take a final assessment to demonstrate their understanding. A Certificate of Completion will be awarded to those who meet the passing criteria.