Electrical Wiring Interconnection Systems (EWIS): Awareness and Best Practices

Course Overview

This course provides comprehensive awareness and best practices related to Electrical Wiring Interconnection Systems (EWIS). It is designed to improve industry understanding of EWIS, highlight lessons learned, review regulatory requirements, and promote safe, standardized wiring practices to enhance aircraft safety and continued airworthiness.

Module 1 — Introduction to EWIS

• 1.1 Background of EWIS
• 1.2 Industry Awareness & Lessons Learned
• 1.3 Evolution of EWIS
• 1.4 What is EWIS?
• 1.5 Importance of EWIS
• 1.6 Objective of EWIS
• 1.7 Elements of an Effective EWIS Program

Module 2 — EWIS Regulations

• 2.1 Introduction
• 2.2 FAA Regulations and Guidance Material on EWIS
  • 14 CFR Part 25, Subpart H: Electrical Wiring Interconnection Systems (EWIS)
  • FAA Guidance Material
    • AC 25.1701-1 – Certification of Electrical Wiring Interconnection Systems on Transport Category Airplanes
    • AC 25-27 A – Development of Transport Category Airplane Electrical Wiring Systems Instructions for Continued Airworthiness Using an Enhanced Zonal Analysis Procedure
    • AC 120-94 – Aircraft Electrical Wiring Interconnection Systems Training Programme
• 2.3 EASA Regulations and Guidance Material on EWIS
  • CS-25 Subpart H (CS 25.1701 – CS 25.1733): Design and certification requirements for EWIS on large aeroplanes
  • EASA Guidance Material
    • 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

Module 3 — General Electrical Wiring Interconnection System Practices

• 3.1 Safety practices
• 3.2 ESDS Device Handling & Protection
• 3.3 Tools, special tools and equipment
• 3.4 Verify Calibration/Certification of Instruments, Tools & Equipment
• 3.5 Required wiring checks using 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 and overview
• 4.2 SWPM Cross-Reference Index
• 4.3 SWPM Important Data and 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 Aeroplane 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 & Areas Found (aeroplane specific)
• 7.6 Maintenance & 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 TWA Flight 800 (1996)
• 10.2 Swissair Flight 111 (1998)
• 10.3 Air Canada Flight 797 (1983)

Who Should Attend

• Aircraft Maintenance Technicians and Engineers
• Avionics Engineers and Technicians
• Quality, Safety, and Compliance Personnel
• CAMO and Continuing Airworthiness Staff
• Aviation Training and Technical Instructors

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.

• Mode: Online
• Course Duration: 145 Minutes
• Validity: 365 Days
• We carefully evaluate the candidates taking up this course. Email us at info@academyaviationonline.com and share your interest in taking up this course.