Flaps / Slats

Question 1

How many SFCC are there? How many channels in each?

Answer 1

• 2 SFCC

- 1 slat channel and 1 flap channel

Question 2

What happens if both channels of an SFCC fail?

Answer 2

If one SFCC is inoperative, slats and flaps both operate at ½ speed.

Question 3

What causes a Wing Tip Brake to activate? How is it reset to normal?

Answer 3

• Activated in case of asymmetry, mechanism overspeed, symmetrical runaway, uncommanded movement of the surfaces.
• On the ground, by engineer.

Question 4

Do flaps and slats have separate W.T.Bs?

Answer 4

Yes

Question 5

How does Automatic Flap Retraction work?

Answer 5

When in config 1+F, the flaps retract to 0 automatically at 210kts before reaching VFE.

Question 6

Is there any automatic slat retraction?

Answer 6

No

Question 7

What is the resulting Flap/Slat config. When Config 1 is selected?

Answer 7

On the ground: 1+F (slats + flaps)

In the air: only slats

Question 8

What does A-LOCK (blue) indication on the EWD?

Answer 8

“A-LOCK” pulses in cyan when the slat alpha/speed lock function is activated. If alpha >8.5 degrees or airspeed <148kts, retraction from 1 to 0 (slats) is inhibited.

Question 9

What is the effect on the sidestick / rudder pedals with the autopilot engaged?

Answer 9

Increases the brake out force on the side stick controllers and the rudder pedals.

Question 10

What is VFE next? How is it represented?

Answer 10

VFE next = max speed to select the next stage of flap.

Question 11

What are the FLAP limiting speeds and maximum altitude for extension?

Answer 11

FLAP 1 1+F 2 3 FULL
SPEED 230 215 200 185 177
Maximum altitude to use flaps: 20,000’