What is the consequence of setting the landing elevation on the LDG ELEV selector?

Setting the landing elevation on the LDG ELEV selector directly influences the cabin pressure management system, allowing it to adjust the cabin altitude appropriately as the aircraft approaches landing. When the landing elevation is set, the cabin altitude is still controlled automatically through the outflow valve. This means that the system will automatically regulate the cabin pressure and altitude based on the selected landing elevation, ensuring a safe and comfortable transition for passengers and crew as the aircraft descends.

The automation of cabin altitude management through the outflow valve is crucial for ensuring that the cabin environment remains stable and within safe limits during the descent and landing phases. This feature is part of the aircraft's design to enhance safety and convenience, as it reduces the workload on the pilots by automatically adjusting the cabin altitude without requiring manual intervention.

The other options indicate scenarios that misunderstand how the system operates. For instance, suggesting that cabin altitude is managed manually would mean the pilots would need to continuously adjust cabin pressure settings, increasing workload and potential for error. Similarly, claiming that cabin altitude is unaffected or only adjustable manually misses the critical role that the automated systems play in ensuring a secure and comfortable flight experience.