What is the function of an MEL in aviation operations?

An MEL, or Minimum Equipment List, plays a critical role in aviation operations by outlining operational limitations for an aircraft that may be operating with certain equipment inoperative. Its primary purpose is to ensure safety while allowing for the continued operation of the aircraft under specific conditions. The MEL provides guidance on which systems or components can be temporarily unusable and under what circumstances the aircraft can still be safely operated.

In contrast, emergency procedures are typically detailed in flight manuals or procedures, and maintenance schedules are usually found in maintenance documentation rather than in the MEL. While the MEL may indicate certain equipment that is allowed to be inoperative, it does not define crew responsibilities, which are usually covered in operational or procedural manuals. Thus, the MEL's focus is specifically on the operational limitations concerning equipment and systems rather than broader operational or procedural aspects.