EWIS Target Group 3

Course Overview

A safe electrical system is built in the engineering office long before it reaches the hangar floor.

EASA EWIS training for Target Group 3 is specifically designed for the professionals who dictate how an aircraft’s electrical nervous system is modified, repaired, and maintained. This high-fidelity course targets qualified staff performing electrical and avionic engineering. You do not turn wrenches; you write the engineering orders, design the modifications, and select the components that the Part-145 technicians must live with. This course is a subset of Raven’s EWIS Target Groups 1 and 2 Course.

We strip away basic awareness and focus entirely on engineering application. You will learn how to design repairs that strictly adhere to the Standard Wiring Practices Manual (SWPM), how to engineer proper physical separation between EWIS and volatile systems, and how to mandate the correct Zonal and Detailed inspections to catch degradation before an arc tracking event occurs.

Whether you need your initial certification or your mandatory continuation course, this training ensures your engineering decisions keep the fleet safe and fully compliant.

Target Audience

This course strictly satisfies the EASA AMC 20-22 requirements for:

• Target Group 3 (Qualified staff performing electrical/avionic engineering): CAMO engineers, technical services personnel, avionics modification designers, and reliability engineers.

Key Learning Objectives

Upon successful completion of this high-fidelity course, learners will achieve the following outcomes:

Knowledge

• Regulatory Framework: Understand the evolution of EWIS AMC 20-22 and the engineering liability associated with wiring as a primary structural element.
• Degradation Mechanics: Identify how operational factors (vibration, thermal cycling, moisture) dictate material selection and routing design.
• Documentation Architecture: Master the layout, purpose, and hierarchy of the manufacturer’s Standard Wiring Practices Manual (SWPM) from a design and specification perspective.

Skills

• Engineering Design Integration: Apply SWPM standards to design safe, compliant wiring modifications, including proper component selection, wire sizing, and circuit protection.
• Routing and Separation: Engineer physical routing paths that maintain strict clearance requirements from flight controls, hydraulic lines, and fuel systems.
• Inspection Specification: Write clear, executable engineering orders that define specific General Visual (GVI) and Detailed (DET) inspection criteria for Part-145 staff.

Competence

• Airworthiness Assessment: Evaluate external modifications or complex defect reports to determine their impact on overall EWIS integrity.
• Systemic Risk Mitigation: Proactively analyze fleet reliability data to identify poor routing designs or recurring EWIS failures and engineer permanent solutions.