MC-4 indicates what?

• A. Minor problem, can service and board
• B. Can service but not board pax
• C. No service or pax until cleared
• D. Flight cancelled

Answer: (D)

MC-4 is a status code used in operations to indicate a cancellation. When this code is in effect, the flight is not going to operate as scheduled, so there will be no passenger service and no boarding for that flight until the status is cleared and a new plan is issued. This is why it’s consistent with a full cancellation rather than merely delaying service or restricting boarding; those more limited scenarios would be described by other codes. In short, MC-4 means the flight is canceled.