After turning on the CDU toggle, the initial MCDU power-up must be completed from which location?

• A. MCDU located in the Flight Deck Center Console
• B. MCDU at the MSO Console
• C. Virtual MCDU at the MSO Console
• D. MCDU in the Aft Cabin

Answer: (A)

The initial power-up of the CDU is tied to the primary flight deck control unit. The MCDU in the Flight Deck Center Console is the designated boot location because it starts the standard CDU boot sequence for the aircraft’s navigation and flight management systems. This ensures the core databases and avionics initialize in the correct order and are synchronized with the flight deck systems.

The MSO Console MCDU is a secondary or diagnostic interface used by the mission system operator, not the primary boot origin for flight operations. A virtual MCDU at the MSO Console is a software representation used for support or training, not the hardware boot path. The MCDU in the Aft Cabin is not part of the primary flight deck initialization and is not used for the initial power-up.

So, the initial MCDU power-up must be completed from the MCDU located in the Flight Deck Center Console.