Flight Controls

Question 1

Does the failure of a single hydraulic system affect primary flight controls?

Answer 1

No, except, ailerons feel heavier.

Question 2

With autopilot engaged, how are flight controls operated?

Answer 2

hydraulically operated by signals from the AFCS.

Secondary controls by FAS

Question 3

If a total hydraulic failure occurs, what flight controls will still operate?

Answer 3

They will all operate mechanically by cables and pully systems.

Flaps and stabiliser electric

Question 4

When will aileron servo tabs unlock and what is their function?

Answer 4

it is locked during normal operations. I one hyd system failure occurs one will unlock to assist in manual operation of the affected aileron. If both fail, both unlock.

Question 5

Does aileron trim require hydraulic pressure?

Answer 5

No

Question 6

What is the normal source of pressure for the rudder? what if it fails?

Answer 6

Hyd system 2. If fails, Hyd system 1.

Question 7

What happens to the rudder when you pass 200kts?

Answer 7

The rudder limiter reduced hyd pressure to 1100psi.

Question 8

What can you do when a rudder limiter failure occurs?

Answer 8

Manually control it via the augmentation panel on overhead.

Question 9

What is the normal source of hydraulic pressure to the elevators?

Answer 9

dual actuators (sys 1 and 2)

Question 10

What would be an obvious difference if elevator hydraulics totally fail?

Answer 10

will feel 5 times as heavy

Question 11

How is stab trim normally controlled?

Answer 11

Via FAS with controls on control column

Question 12

How is the stab trim wheel used for trimming?

Answer 12

if Primary means fails, wheel can be used. it is hydraulically powered.

Question 13

When can you use electric trim?

Answer 13

when hydraulic system failure occurs revert to electric trim.

Question 14

What does the flight controls lock affect?

Answer 14

locks ailerons and elevator

Question 15

What flap positions may be selected?

Answer 15

8 25 going down, 15 going up.

Question 16

If hydraulic pressure to the flaps fails, how can the flaps be operated?

Answer 16

via electric control. switch is located next to flap lever.

normal ops cannot be reconnected after this switch has been pulled.

Question 17

What happens when flap asymmetry occurs? can it be reset?

Answer 17

hydraulic operation deactivates and laps remain at current position. cannot rest/resume normal ops.

Question 18

What is flap disagreement? what can be done about it?

Answer 18

Disagreement between position of flap lever and actual position. Recycle then use alt procedure.

Question 19

Will a flap disagreement alert be presented in whilst in alternate operation?

Answer 19

No

Question 20

Is there any speed restriction on the use of the speed brake? how does airspeed affect speed brake deployment?

Answer 20

No speed limit, but less then 190 allows full 60 degrees.

Question 21

When does automatic speed brake retraction occur?

Answer 21

When:

• the TOGA triggers are activated
• a thrust lever is advanced beyond MIN TO with landing gear up.
• maximum forward thrust position is selected (wind shear escape)
• the landing gear is selected up with both thrust levers set above MIN TO (manual go around)

Question 22

What indication is there of speed brake operation?

Answer 22

2x blue lights on main instrument panel.

Question 23

When do you arm the lift dumpers? what is the armed indication?

Answer 23

on ground before take off and before landing (after gear selected down).

Question 24

When will lift dumpers automatically extend? is there backup for this?

Answer 24

will deploy with RTO when thrust levers retarded and speed is above 50kts

upon landing when wheels spin up to 50kts on touchdown and thrust levers are in idle.

backup is when reverse thrust levers are raised.

Question 25

When will lift dumpers disarm? How do you know they didn’t.

Answer 25

by pressing disarm. at liftoff and when thrust levers are advanced. Alert 1 “not disarmed”.

Question 26

When can you arm the lift dumpers on approach?

Answer 26

after gear down and locked

Question 27

If you get a LIFTD UNSAFE alert, what can you do?

Answer 27

switch them off. no lift dumpers now available.

Question 28

What does the stall prevention system consist of?

Answer 28

2x AOA vanes
2 stall protection computers
2 stall protection enhancement units
2 stick shakers
1 stick shaker

Question 29

What activates the stick shaker and pusher?

Answer 29

below 20 250ft, the stall protection computer (function of flap and AOA)

above 20250 ft, the stall protection enhancement units
based on speed from FCC

if both enhancement units fail, still provided by stall protection computers but margin is reduced.

Both stall protection computer activate pusher.

Question 30

How is the stick shaker disconnected? can it be reset in flight?

Answer 30

via the disconnect handle. it is locked, cant be reset.

Question 31

How do you check if the take off configuration is correct?

Answer 31

by pressing TAKE OFF CONFIG test button

Question 32

What are the take off warning alerts?

Answer 32

TO Flap
Takeoff stab
TO park brake
TO speed brake
TO LOFTD
TO CTL lock
TO EL (one system US)

All alert level 3.

Question 33

Can the takeoff warning be cancelled?

Answer 33

No