CPL Aircraft General Knowledge · Mock exam

Why is it important to pre-select the landing field elevation on the pressurisation controller before beginning descent?

• A.To arm the negative pressure relief valve for the landing configuration
• B.To allow the outflow valve to open fully and flush the cabin air prior to landing
• C.So the controller schedules cabin altitude to reach destination elevation at touchdown, avoiding a sudden loss of differential when doors open
• D.To enable the automatic bleed air crossover that switches from high-stage to low-stage bleed at the scheduled descent point