Spoilers

Question 1

Which act as speedbrakes and which act as roll spoilers?

Answer 1

Spoilers 2,3,4 speedbrakes (ones in the middle)
Spoilers 2,3,4,5 roll (all but one)

5 4 3 2 1 1 2 3 4 5

Question 2

At what speed will ground spoilers deploy?

Answer 2

> 72kts

Question 3

Explain phased lift dumping and it’s purpose?

Answer 3

Allows ground spoilers to extend with reduced deflection in order to accelerate full spoiler extension.

Question 4

What is the effect on VLS when operating the speedbrakes?

Answer 4

VLS increase

Question 5

What is the effect on speedbrakes when operating at high Mach numbers?

Answer 5

Longer time to retract, increased VLS and reduces the buffet margin.

Question 6

Approximately how long does it take to retract speedbrakes from full at high altitude?

Answer 6

25 seconds from full speedbrake

Question 7

What are the main consequences of a SEC 1 failure?

Answer 7

No speedbrakes. VLS would not be corrected if speed brakes 2 extend due no speedbrakes position sent to the FACs