What does MEL stand for in aviation terminology?

In aviation terminology, MEL stands for Minimum Equipment List. The Minimum Equipment List is a critical document for flight operations, as it specifies the equipment and instruments that must be functional for a flight to safely operate under specific conditions. When certain items on the aircraft are not functioning, the MEL provides guidance on whether the flight can continue and what operational limitations should be observed.

The purpose of an MEL is to enhance safety while allowing for flexibility in operations; it helps in managing discrepancies that may occur with aircraft systems without grounding the aircraft unnecessarily. Adherence to the MEL ensures that the aircraft can still safely meet the regulatory requirements stipulated by aviation authorities.

In contrast, the other options do not accurately reflect the meaning of MEL in aviation. For example, "Maximum Engine Limitations" and "Mandatory Emergency Landing" imply restrictions and procedures not covered under the definition of MEL. "Maintenance Evaluation Log" suggests a record-keeping function that describes ongoing maintenance assessments rather than a regulatory framework governing operational safety.