What is the MAIN CABIN DOOR (MCD) primarily used for?

• A. The aircraft door primarily used for passenger boarding and deplaning.
• B. An emergency exit only for crew use.
• C. The door used to access the galley during flight.
• D. The door used exclusively for cargo loading.

Answer: (A)

The main cabin door is the primary entry and exit for passengers during boarding and deplaning. It’s the forward door used with a jet bridge or stairs to admit passengers before takeoff and to discharge them after landing. While it can be opened for an evacuation and will have a slide deployed for safety, its main role is normal passenger movement. It isn’t used to access the galley during flight, and cargo loading uses separate cargo doors, not the main cabin door.