In aviation, what is the purpose of a Minimum Equipment List (MEL)?

The Minimum Equipment List (MEL) serves a crucial purpose in aviation by providing a detailed inventory of equipment that must be operational for a flight to safely proceed. The MEL is developed specifically for an aircraft type and outlines which instruments and components are essential for the flight, considering both safety and regulatory compliance. This list allows flight crews to determine whether they can operate the aircraft safely if certain equipment is inoperative. It ensures that risks are managed effectively and that the aircraft can still be operated within defined limits, reflecting the aircraft's capabilities and the operational environment.

The MEL is different from components related to flight crew training, airport services, or landing procedures, as it specifically addresses the functionality of onboard equipment critical for ensuring the safety of the flight. By adhering to the MEL, aviation operators can maintain a high standard of safety while allowing for flexibility in operations under certain conditions.