What does the term "MEL" refer to in aircraft operations?

The term "MEL" in aircraft operations stands for "Minimum Equipment List." This is a critical document that specifies the minimum equipment that must be functional for an aircraft to be considered airworthy under specific conditions. The MEL is developed by the manufacturer and approved by the regulatory authority, outlining the essential systems and components that must operate correctly for safe operation.

The MEL allows for certain equipment to be inoperative during flight as long as the aircraft can still be flown safely and all necessary limitations and procedures are followed. It ensures that even when equipment is not functioning, the aircraft can still be dispatched safely and operate within regulated parameters.

Understanding the MEL is essential for flight crews and maintenance personnel, as it directly influences operational safety and regulatory compliance. This concept is distinct from other terms such as "maximum engine load," "mandatory exit list," or "maximum elevation limit," which do not pertain to the specifics of aircraft equipment and operational safety.