How does the pressurization system receive landing field elevation information in a diversion scenario?

The pressurization system in the A320 receives landing field elevation information primarily from the FMGC (Flight Management and Guidance Computer). When a diversion scenario occurs and a new destination is entered, the FMGC accesses its internal database, which contains the elevation data for various airports. This data is essential because it allows the aircraft’s pressurization system to adjust appropriately for the new landing environment.

Understanding this process is crucial, as accurate altitude information ensures safety and comfort throughout the descent and landing phases. The FMGC's role is to calculate various flight parameters, including managing pressurization settings based on the elevation data it has for the entered destination. By leveraging this database, the system ensures that pressurization is managed effectively according to the specific characteristics of the new landing field.