The EWIS (Electrical Wiring Interconnection System) training provides a comprehensive understanding of electrical wiring systems and their importance to aircraft safety, functionality and reliability. With AMC 20-22, EASA requires demonstrated initial and recurrent training on this subject. This affects all personnel (PART 145, 21, M) with varying content and levels.

Some of the essential contents are:

Fundamentals of EWIS
The training begins with an introduction to the basics of electrical cabling systems, including the various components, cable types, connectors and interconnections. Participants will learn how these systems are integrated into the aircraft and how they work together to transmit and distribute electrical power.

Safety Aspects
Because aircraft electrical systems are a potential fire hazard, emphasis is placed on safety aspects. The training covers the necessary protective measures, isolation and shielding techniques, and identification of potential hazards.

Regulatory requirements
The training explains the relevant regulatory requirements and rules that apply to aviation electrical cabling systems. This includes both international standards and national regulations to ensure participants are familiar with the regulatory framework.

System Architecture
The course provides an understanding of the structure and architecture of EWIS in various aircraft types. This includes identifying the main circuits, subsystems, interconnects and controls to provide a comprehensive picture of how the wiring is arranged in the aircraft.

Maintenance and Inspection
Participants will learn best practices for EWIS maintenance, inspection, and repair. This includes identifying wear, corrosion, and other problems that could affect the performance of the cabling systems.

Troubleshooting and diagnostics
The training covers techniques for troubleshooting and diagnosing problems in EWIS. Participants will learn how to identify, isolate, and troubleshoot electrical problems to minimize downtime and ensure safety.

Hands-on exercises and simulations
Training often includes hands-on exercises where participants work on realistic scenarios to apply their knowledge and skills. This may involve the use of simulators or real aircraft components.

EWIS training ensures that professionals have the necessary knowledge and practical skills to safely maintain, repair and monitor electrical cabling systems. This contributes significantly to the safety, efficiency and reliability of air traffic.