What is the maximum differential pressure for takeoff and landing?

What is the maximum differential pressure for takeoff and landing?

• A. 0.2 psi
• B. 0.3 psi
• C. 0.5 psi
• D. 0.1 psi

Answer: (A)

Takeoff and landing are phases where the airplane transitions between ground conditions and climb, with potential for rapid pressure changes and loads on the fuselage. The system limits the cabin pressure differential to a very small value during these phases—0.2 psi—so the structure isn’t stressed by sudden pressure swings and so components like doors and seals aren’t subjected to large loads while the aircraft is near the ground. Once the aircraft is in flight and the pressurization system is operating in its normal regime, it can maintain a much higher differential pressure safely. That’s why 0.2 psi is the specified limit for takeoff and landing.

Takeoff and landing are phases where the airplane transitions between ground conditions and climb, with potential for rapid pressure changes and loads on the fuselage. The system limits the cabin pressure differential to a very small value during these phases—0.2 psi—so the structure isn’t stressed by sudden pressure swings and so components like doors and seals aren’t subjected to large loads while the aircraft is near the ground. Once the aircraft is in flight and the pressurization system is operating in its normal regime, it can maintain a much higher differential pressure safely. That’s why 0.2 psi is the specified limit for takeoff and landing.