For CAT II approach, which flap setting is mandatory?

For CAT II approach, which flap setting is mandatory?

• A. Flaps 3
• B. Flaps 4
• C. Flaps 5
• D. Flaps 6

Answer: (C)

CAT II approaches require a fixed, certified landing configuration that provides stable, low-speed handling and reliable performance to meet the lower decision heights. For this aircraft, the approved CAT II approach configuration is with Flaps five. This setting gives enough wing camber and lift at the slower approach speeds, enabling a stable descent and reliable capture of the ILS with the autoland/flight-control system within the CAT II envelope. Using a lighter flap setting would leave you at a higher approach speed with reduced margin, not meeting the CAT II certification requirements. Using a heavier setting would introduce more drag and alter performance in a way that isn’t required for CAT II and may complicate the approach profile. So, Flaps five is the mandated setting.

CAT II approaches require a fixed, certified landing configuration that provides stable, low-speed handling and reliable performance to meet the lower decision heights. For this aircraft, the approved CAT II approach configuration is with Flaps five. This setting gives enough wing camber and lift at the slower approach speeds, enabling a stable descent and reliable capture of the ILS with the autoland/flight-control system within the CAT II envelope. Using a lighter flap setting would leave you at a higher approach speed with reduced margin, not meeting the CAT II certification requirements. Using a heavier setting would introduce more drag and alter performance in a way that isn’t required for CAT II and may complicate the approach profile. So, Flaps five is the mandated setting.