What type of testing ensures operational capability of the CACS?

The operational capability of the Cabin Atmosphere Control System (CACS) is primarily ensured through flight and ground testing. This type of testing involves systematic evaluations of the system's performance under various conditions, both in the air and on the ground. It is crucial for verifying that the CACS maintains the appropriate environment for the cabin, including temperature, pressure, and air quality, which directly affects the safety and comfort of passengers and crew.

Flight and ground testing allows engineers and technicians to simulate different operating conditions, troubleshoot potential issues, and confirm that the system responds correctly to various scenarios. This rigorous approach provides comprehensive insights into how effectively the CACS functions and ensures that it meets all regulatory and safety standards before being deployed during actual flights.

Other options, such as cabin crew training assessments, passenger satisfaction surveys, and cabin interior inspections, play important roles in the overall management of cabin services and environment. However, they do not specifically test the operational capabilities of the CACS. Regular cabin crew assessments focus on the crew's ability to manage cabin operations, while passenger surveys provide feedback on passenger experiences, and cabin inspections check for physical condition or cleanliness rather than the functionality of the atmospheric system.