The Cabin Pressurization System simulates the function of a complete aircraft cabin atmosphere and pressurization control system. The trainer is manufactured using fully functional aircraft components. Due to the close proximity of all the components, students can comprehend how the total system works and how the interaction between various components regulates the cabin environment. The trainer has two sealed chambers simulating altitude and cabin pressure. The vacuum chamber can simulate altitude up to approximately 22,000 ft. above the mean sea level. The cabin chamber simulates the pressurized aircraft cabin, and contains cabin components.