Sofema Online (SOL) www.sofemaonline.com considers the MMEL Development Process

Introduction

The MMEL is a document issued by the aircraft's original equipment manufacturer (OEM) that lists equipment and systems that may be inoperative for certain flight conditions. Each item on the MMEL is associated with a specific operational procedure to ensure safety during the flight. The MMEL is a critical part of an aircraft's operational certification and is a reference for creating an airline's Minimum Equipment List (MEL).

Creating a Master Minimum Equipment List (MMEL) for a new aircraft is a complex and lengthy process that requires a deep understanding of the aircraft's systems, operation, and safety principles. The aircraft manufacturer designs and tests the aircraft, taking into account various scenarios including situations where certain components or systems might not be operational. These tests will inform the initial draft of the MMEL.

For EASA regulatory environment we must consider Operational Suitability Data (OSD) which is a group of interconnected data elements that are necessary to demonstrate the operational suitability of an aircraft type.

The OSD is part of the aircraft type certification and includes, among other things, the Master Minimum Equipment List (MMEL).

Sofema Online (SOL) www.sofemaonline.com Considers the applicable repair criteria – ref Implementation Procedures for Airworthiness Revision 1 March 29, 2019.

Introduction - Design Data for Repairs

Acceptance of Design Data Used in Support of Repairs.

» Design data used in support of repairs must be approved or accepted, as appropriate, by the Exporting Authority (EA) / State of Design (SOD).

Sofema Online (SOL) www.sofemaonline.com considers the various requirements related to the issue of Export Airworthiness Certification.

Introduction – Export Airworthiness Approval Procedures

Export Certificates of Airworthiness are issued by the FAA and the CAA for completed aircraft.

» Authorized Release Certificates (Airworthiness Approval Tags), or equivalent, are issued by the FAA and the CAA for aircraft engines, propellers, and articles.

Overview by Sofema Online (SOL) www.sofemaonline.com

Airworthiness Directives (ADs) are legally enforceable rules issued by the FAA in accordance with 14 CFR part 39 to correct an unsafe condition in a product.

     »  14 CFR part 39 defines a product as an aircraft, aircraft engine, propeller, or appliance.

AD Development and Issuance

FAA Order 8040.1 defines FAA's authority and responsibility for the development and issuance of ADs.