Global 6000 Practice Test

The main idea is how cabin pressure compares to outside pressure during the landing phase. The pressurization system guides the cabin toward ambient pressure as you descend, so the differential pressure (cabin minus outside) is kept small to protect the fuselage and seals on touchdown. For this aircraft, the published limit at or near landing is about 1 psi, which minimizes structural loads and helps ensure safe equalization with the outside air as you touch down. Values higher than that would impose greater stresses on the fuselage and door/window seals during the final phase of flight, which isn’t permitted by the design and procedures.