What does "MEL" stand for in aviation?

In aviation, "MEL" stands for Minimum Equipment List. This is a critical document that outlines items and equipment that must be operational for a flight to be conducted safely. The MEL allows for the deferral of specific inoperative systems provided that the aircraft is maintained within predefined limitations. This means that certain equipment can be inoperative while still enabling the aircraft to operate safely and in compliance with regulations.

The MEL is developed for each aircraft model and is approved by aviation authorities, ensuring that safety is not compromised. It is derived from the aircraft's Minimum Equipment List, which is a baseline document outlining the essential systems required for the aircraft to operate. Understanding and utilizing the MEL is crucial for pilots and maintenance personnel when determining whether an aircraft is airworthy under specific circumstances.