What does MEL stand for in aviation maintenance?

In aviation maintenance, MEL stands for Minimum Equipment List. This term is crucial as it relates to the specific items of equipment that must be operational for an aircraft to be considered airworthy for flight. The Minimum Equipment List is a compilation of the instruments, equipment, and systems that, if inoperative, do not prevent the safe operation of the aircraft. This list is tailored to each aircraft type and is approved by aviation regulatory bodies.

Understanding this concept is vital for maintenance personnel and pilots because it provides guidelines on how to manage aircraft functionality and safety when certain equipment malfunctions. The MEL allows for operational flexibility while ensuring that the critical systems required for safe flight are functional, thereby enhancing safety and efficiency in aviation operations.