Sofema Aviation considers the key requirements related to the oversight and management of Non-Mandatory Service Bulletins (SB’s) Introduction The assumption that “no mandate equals no obligation” is a common trap in aviation management. While you are legally correct that a non-mandatory Service Bulletin (SB) does not carry the same “ground-the-airplane” weight as an Airworthiness Directive…

Sofema Aviation Services (SAS) considers key aspects related to EWIS Design Considerations Electrical Wiring Interconnection Systems (EWIS) are a critical safety component of modern aircraft. Historically overlooked or treated as secondary to other systems, poor EWIS design has contributed to multiple catastrophic failures (TWA 800 – Swissair 111 –United Airlines (UAL) Flight 811 usually with…

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…

Sofema Aviation Services (SAS) www.sassofia.com considers aspects of the Enhanced Airworthiness Program for Airplane Systems (EAPAS). Introduction The EAPAS is designed to enhance current airplane systems airworthiness programs at operator facilities, repair stations, and manufacturing plants based on data-driven initiatives developed under the Aging Transport Non-Structural Systems Plan. The EAPAS implementation plan is organized into…