What is the role of the MMEL during flight operations?

The Master Minimum Equipment List (MMEL) plays a crucial role in flight operations by identifying equipment that may be inoperative while still allowing the aircraft to be safely operated. It provides guidance on which systems and instruments can be non-functional without compromising flight safety, thereby enabling flight crews and maintenance personnel to make informed decisions regarding aircraft dispatch.

The MMEL is developed by aircraft manufacturers in conjunction with aviation regulatory authorities and outlines specific conditions and limitations under which the aircraft can still operate safely with certain equipment inoperative. This helps prevent unnecessary cancellations and allows for operational flexibility, especially in non-critical systems.

Having the MMEL in place ensures that pilots and operators are aware of any limitations associated with an aircraft's configuration, which is vital for maintaining safety and compliance with aviation regulations.