What is the primary purpose of an MEL?

The primary purpose of a Minimum Equipment List (MEL) is to determine which equipment can be inoperative while still allowing the aircraft to be flown safely. An MEL provides a framework for pilots and operators to identify the specific systems and components that are critical to the safe operation of the aircraft. It does this by categorizing equipment into mandatory and non-mandatory items, allowing for clarity on what can be deferred or repaired later without compromising safety. By adhering to the MEL, pilots can ensure they are compliant with regulations while also maintaining operational efficiency.

While listing all mandatory equipment is important, the MEL specifically focuses on what can be inoperative under specific conditions, making it a crucial tool for flight planning and safety management. Additionally, compliance with regulatory standards is essential in aviation, but the MEL's focus is more on operational capability with existing limitations. Maintenance schedules, while important for aircraft upkeep, are separate from the MEL's primary intent of ensuring safety during operations with inoperative equipment.