Abstract: An air outlet valve for use in an aircraft is adapted during normal operation of the aircraft as a component of a cabin pressure control system for adjusting a desired pressure level in an aircraft cabin to remove air from an interior of the aircraft into the environment around the aircraft. The air outlet valve is further adapted during emergency ventilation operation of the aircraft as a component of a system for emergency ventilation of the aircraft cabin to introduce air from the environment around the aircraft into the interior of the aircraft. The air outlet valve comprises a nose-side valve flap, which is pivotable about an axis and is adapted to open or close a nose-side portion of an air outlet valve aperture, and a tail-side valve flap, which is pivotable about an axis and is adapted to open or close a tail-side portion of the air outlet valve aperture.

Abstract: The invention proposes that a camera (18) takes a technical picture of an air outlet valve (10) of an aircraft, and the picture taken of the outlet valve (10) is displayed on a picture display unit (20), for example in the cockpit of the aircraft. By shining light onto the outlet valve from a light source (22), a clear picture with a high level of contrast is produced. The valve setting of the outlet valve (10) can thus be monitored visually, in a reliable manner, by the pilot.

Abstract: The invention proposes that a camera (18) takes a technical picture of an air outlet valve (10) of an aircraft, and the picture taken of the outlet valve (10) is displayed on a picture display unit (20), for example in the cockpit of the aircraft. By shining light onto the outlet valve from a light source (22), a clear picture with a high level of contrast is produced. The valve setting of the outlet valve (10) can thus be monitored visually, in a reliable manner, by the pilot.