Which statement about the Master Minimum Equipment List (MMEL) is correct?

• A. It lists inoperative equipment allowed under certain conditions; determines whether flight can proceed with MEL items.
• B. It lists all essential equipment required for flight.
• C. It is a weather forecast document for MEL planning.
• D. It is a NOTAM about MEL items.

Answer: (C)

The key idea is understanding what the Master Minimum Equipment List does. The MMEL is a document that specifies which equipment may be inoperative and the conditions under which that inoperative state is acceptable for flight. It tells the crew and maintenance team what can be deferred, what checks or limits apply, and what actions are required to allow the flight to proceed with those MEL items still unserviceable. It is a planning and operational tool for managing equipment faults, not a weather briefing, not a list of essential equipment, and not a NOTAM. So the correct description is that it lists inoperative equipment allowed under certain conditions and helps determine whether a flight can proceed with MEL items.