What does "MEL" signify in the context of aviation?

In the context of aviation, "MEL" stands for Minimum Equipment List. This is a crucial document for aircraft operations that specifies the equipment and instruments that must be functioning for the aircraft to be considered airworthy and safe to operate.

The MEL is part of the aircraft's approved operating documents and allows for certain equipment to be inoperative under prescribed conditions, ensuring that the aircraft can still be legally and safely flown. It provides specific procedures that must be followed if one or more required pieces of equipment are found to be inoperative, guiding pilots and maintenance personnel in managing flight operations safely.

While other terms, like "Maximum Equipment List" or "Mandatory Equipment List," may sound similar, they do not accurately reflect the specific legal and operational framework that the MEL provides. The term "Maintenance Essential Log" does not pertain to aircraft operation and is not recognized as a standard term in aviation, differentiating it from the MEL's established role.