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Flashcards in Flaps / Slats Deck (12)
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1

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

- 2 SFCC
- 1 slat channel and 1 flap channel
- Each computer controls half of the actuators for
each surface.

2

What happens if both channels of an SFCC fail?

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

3

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

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

4

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

Yes

5

How does Automatic Flap Retraction work?

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

6

Is there any automatic slat retraction?

No

7

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

On the ground: 1+F (slats + flaps)
In the air: only slats

8

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

A-Lock prevents the retraction of the slats from CONF 1 to zero if the speed is low or angle of attack is too high

“A-LOCK” pulses in Green (cyan in older sims) when the slat alpha/speed lock function is activated.

9

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

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

10

What is VFE next? How is it represented?

VFE next = max speed to select the next stage of flap.
Amber = sign on the IAS.

11

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

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

12

What is indicated in blue/green on the flap indicator?

Blue - selected position of flap lever.
Green - Actual position of flaps.