What is the function of an MEL in aviation operations?

The function of an MEL, or Minimum Equipment List, in aviation operations is primarily to outline operational limitations. This document specifies the instruments or equipment that may be inoperative for the aircraft to still be considered airworthy and to operate safely within defined parameters. By clearly detailing which items can be inoperative, the MEL helps ensure that the aircraft can still conduct flights without compromising safety.

The MEL is created in conjunction with regulatory authorities and is specific to each aircraft type. It serves as a critical reference for flight crews and maintenance personnel, as it guides them on how to operate the aircraft safely even with certain equipment not functioning. This operational limitation aspect is essential for maintaining safety while allowing some flexibility in aircraft operation.