System and method to detect authorized user

A system comprising:

• a camera configured to capture an image within a flight deck of an aircraft;
• a non-transitory memory maintaining program instructions and one or more authorized faces;
• and
• one or more processors configured to execute the program instructions maintained on the memory, the program instructions causing the one or more processors to:
• receive the image from the camera;
• determine a detected face within the image is unauthorized, thereby indicating an unauthorized user is disposed within the flight deck;
• wherein the one or more processors detects the detected face by a facial detection algorithm;
• wherein the one or more processors determines the detected face within the image is unauthorized by comparing the detected face with the one or more authorized faces;
• and
• change a mode of the aircraft from a full authority mode to a reduced authority mode in response to determining the detected face within the image is unauthorized;
• wherein the unauthorized user has full authority to control one or more user interface elements of the aircraft in the full authority mode;
• wherein the unauthorized user has reduced authority to control the one or more user interface elements of the aircraft in the reduced authority mode.