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).
