This 2-day intensive course provides participants with a comprehensive understanding of the requirements and responsibilities associated with the design, integration, and substantiation of Electrical Wiring Interconnection Systems (EWIS) under EASA Part 21. The training addresses regulatory frameworks, best practices, and compliance strategies to support both initial airworthiness and continued safety of aircraft systems.

Through practical insights, the course supports the implementation of EWIS design standards that align with CS-25, AMC 20-22, and industry safety objectives. Participants will gain a firm grounding in identifying failure conditions, hazard classifications, and the application of EWIS design and separation principles.

By completing this training, participants will be able to:
• Understand the regulatory context and technical basis for EWIS within EASA Part 21
• Recognise risk factors and safety considerations in EWIS design and integration
• Apply certification principles to ensure compliance with EWIS requirements
• Improve coordination between design, production, and inspection teams regarding electrical system reliability
• Support organisational compliance and readiness for oversight audits

1. Introduction
2. EWIS Regulatory Drivers
3. Acronyms
4. Terminology
5. EWIS Background
6. Why are we training EWIS?
7. Swissair 111 / BA 737-436, G-DOCH
8. AMC 20-21
9. CS 25 Subpart H Electrical Wiring Interconnect Systems (EWIS)
10. Development of EWIS Inspection
11. CRI H-01 “Instructions for Continued Airworthiness (ICA) on Electrical Wiring Interconnecting Systems (EWIS)
12. Part 21 EWIS Design Challenges & Mitigations
13. AMC 20-8 - Mandatory Reporting
14. Standard Practices
15. Electro Static Discharge Sensitive - ESDS
16. IFE & WiFi Installation and Certification Considerations
17. LRU Replacement General Practices
18. HF Integration into EWIS Design
19. Zonal Areas of Inspection and Levels
20. EWIS - Areas of Concern
21. Housekeeping
22. Inspection of Wiring

• Define EWIS and explain its role in aircraft safety and airworthiness
• Understand the regulatory framework governing EWIS, including EASA Part 21 and CS-25 requirements
• Identify the responsibilities of design and production organisations (DOA/POA) in relation to EWIS
• Interpret key certification requirements for EWIS compliance and documentation
• Recognise common failure modes and degradation factors affecting wiring systems
• Apply design principles for proper routing, separation, and protection of electrical wiring
• Evaluate environmental risks such as heat, vibration, contamination, and mechanical stress
• Understand best practices in splicing, shielding, and connector integrity
• Implement effective mitigation techniques during design and modifications to preserve EWIS integrity
• Promote safe maintenance procedures that prevent inadvertent damage to EWIS during servicing

This course is intended for:
• Design and Certification Engineers
• Airworthiness and Compliance Managers
• DOA/POA Staff and Project Leaders
• Safety, Quality & Engineering Personnel
• Anyone involved in the approval or integration of electrical systems under Part 21
It is especially beneficial to those preparing for regulatory oversight, audits, or developing compliance documentation for electrical systems and installations.

Course type: Presentation without voice over

Duration equivalent to 2-day classroom training
Category: Part 21
Price: 135.00 EUR

•      For Individuals: SOL Plus
This program is designed for individual clients aiming to save significantly while accessing free courses throughout their online training journey.

•       For Corporate Clients: Privileged Training Program (PTP)
Empower your team with consistent training discounts and special features like Enrol Now - Pay Later and Prepay Bonus Plan.

For multiple courses/users discount please contact us at team@sassofia.com