What is the pressurization limitation during takeoff and landing?

During takeoff and landing, the pressurization limitation is typically set to 1.0 psi. This limitation is particularly important as it ensures that the aircraft can safely handle atmospheric changes without compromising structural integrity or passenger comfort.

1.0 psi is enough to maintain a proper cabin environment during the critical phases of flight, which includes potential rapid changes in altitude and pressure. If the pressurization differential were to be higher during these phases, it could pose risks such as the potential for structural stress on the aircraft fuselage or complications in cabin safety.

While the other options represent different pressure levels, they exceed what is considered safe and standard for takeoff and landing procedures. Thus, adhering to the 1.0 psi limitation helps ensure the aircraft operates within its safety margins at key points during flight.