Part 21

Introduction to the EASA Management System Assessment Tool (MSAT) – Issue 2

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MSAT blog image

June 09, 2025

Steven Bentley

Sofema Aviation Services (SAS) considers the key elements of the MSAT Tool The EASA MSAT Issue 2 represents a paradigm shift from compliance-focused oversight to a holistic, performance-driven model. It challenges both authorities and operators to go beyond minimum requirements, embedding resilience, risk-awareness, and continuous improvement into everyday operations. By embracing MSAT, the aviation community…

Sofema Aviation Services Considers EASA Lead Auditor Prerequisites

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EASA Lead Auditor blog image

June 04, 2025

Steven Bentley

Sofema Aviation Services provides the following discussion regarding the challenge to become an EASA Lead Auditor, addressing regulatory compliance, best practices, and practical guidance Introduction: Prerequisites for Becoming an EASA Lead Auditor Regulatory Context – EASA does not explicitly define a single standardized qualification for “Lead Auditors” across all contexts. Instead, Lead Auditors typically operate within…

Part 21 Design Organisations Subpart J – EWIS Challenges & Mitigations

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"Electrical wiring and schematic diagram with orange fiber optic cables, overlaid with the Sofema Aviation Services logo and a title text about Part 21 Design Organisations Subpart J – EWIS Challenges & Mitigations."

April 02, 2025

Steven Bentley

Sofema Aviation Services (SAS) considers key elements of the EASA Part 21 EWIS design and best practice implementation. Introduction EASA Part 21 Design Organisations Subpart J face significant challenges in managing and maintaining Electrical Wiring Interconnect Systems (EWIS). Historical evidence, including major accidents has shown that improper EWIS design, maintenance, and oversight can lead to…

FAA Suspected Unapproved Parts (SUP) Program Overview and Developments

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Aircraft engine undergoing maintenance in a hangar with open nacelles, representing aviation inspection procedures.

March 26, 2025

Steven Bentley

Sofema Aviation Services (SAS) reviews the current FAA Suspected Unapproved Parts (SUP) Program and considers key features. Introduction The FAA Suspected Unapproved Parts (SUP) Program Office, initiated in November 1995, continues to be a critical initiative for maintaining safety and integrity within the aviation industry. The program aims to proactively identify, address, and remove unapproved parts from the…

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