Chapter 27 Flight Controls

Question 1

Which actuator is used for standby rudder?

Answer 1

The Standby PCU
Located on top of rudder

Question 2

Where is the “Transfer mechanism” located?

Answer 2

In the FWD E/E bay on the F/O control column.

Question 3

What features are on the transfer mechanism?

Answer 3

A torsion spring and a lost motion device.

Question 4

How many degrees has the lost motion device before moving the spoilers?

Answer 4

12 degrees

Question 5

How would you read the gap of a leading edge proximity sensor?

Answer 5

Via the FSEU

Question 6

How do you test the “stall warning” or stick shakers?

Answer 6

Via the test button on the P5 overhead.

Question 7

If the yaw damper is active and working, will it move the rudder pedals?

Answer 7

No, there is no feedback.

Question 8

What is on the flight control hydraulic module package?

Answer 8

Flight control shutoff valve,
Spoiler shutoff valve,
Low px switch

Question 9

The pressure switch on the hydraulic module package indicates what?

Answer 9

The low pressure light indicates low hydraulic pressure when the switch is in the on or off position.

When the flight control switch is in the STBY RUD position, the low pressure light is control by the STBY RUD shutoff valve.

Question 10

How do you manually start the STBY HYD pump?

Answer 10

By arming the ALT flap switch or the flight control switch

Question 11

When will standby hydraulics automatically kick in?

Answer 11

If the flight control switch is ON and one hydraulic system gives a low pressure indication during flight.

Question 12

What happens if one right hand aileron becomes jammed?

Answer 12

The shear rivets on the bus drum will shear to isolate the jammed aileron, allowing the others to work.

Question 13

If the captains control cable to the ailerons becomes jammed, how do you regain control?

Answer 13

You can control the aircraft via the transfer mechanism using the F/O’s cables to the spoilers.

Question 14

How many proximity sensors is there in the L/E flap system?

Answer 14

There are 8 proximity sensors in the L/E flap system.

4 kruger flaps, containing 2 sensors each.

Question 15

How many proximity sensors is there in the L/E slat system?

Answer 15

22.

Question 16

How many proximity sensors in the L/E flap and slat system?

Answer 16

30.

8+22.

Question 17

How many leading edge slats are there in total?

Answer 17

8.

4 per wing.

Question 18

What does WTRIS do and when is it active?

Answer 18

The WTRIS system gives an input to the STBY PCU in the rudder to give assistance in a manual reversion turn.

WTRIS engages when the flight control A+B switches are in the STBY RUD position and the yaw damper is on.

Question 19

What is the purpose of WTRIS?

Answer 19

It gives small turn co-ordination using the STBY rudder PCU.
It is limited to 2.5 degrees with flaps down.

Question 20

How does the horizontal stabiliser move?

Answer 20

Mechanically (trim wheel)
Electrically (trim switch)
Via the autopilot (magic)
(also in order of priority)

Question 21

If you push the control column FWD (down) and then trim the stab up, what happens?

Answer 21

The STAB trim cutout switches stop the stab from moving.

Question 22

What is the purpose of alternate flaps?

Answer 22

To extend the leading edge flaps and slats as well as moving the trailing edge flaps using the STBY hydraulic system.

Question 23

If the stabiliser moves, what else will move?

Answer 23

The elevator will move through neutral shift.

Question 24

How many indications do you have for leading edge devices concerning their position?

Answer 24

3,
Transit,
Extend,
Fully Extend.

Question 25

What is flap asymmetry?

Answer 25

When one section on a wing moves, but the opposite wings section does not move.
(The airplane is not symmetrical)

Question 26

What is flap skew?

Answer 26

When one section on the same wing does not move as it should.

Question 27

How many skew sensors is there?

Answer 27

8 total.

Question 28

What indicates that a flap skew has occurred?

Answer 28

A 15° needle split.

Question 29

What indicates a flap asymmetry condition?

Answer 29

The needle shows the actual position.

Question 30

How will having flaps deployed effect the stabiliser trim electrical switches?

Answer 30

The trim will adjust much faster.

Question 31

What are the pitot probes on the vertical stabiliser for?

Answer 31

The are for the elevator feel computer.
This alters control column forces as the speed increases on the aircraft.

Question 32

What is the stabiliser neutral position?

Answer 32

4 units of trim.

Question 33

Where is the rudder trim actuator located?

Answer 33

In the vertical stabiliser
(Fin)

Question 34

Which LRU is used in association with WTRIS

Answer 34

SYMD 2

Question 35

What parameters trigger the feel differential light?

Answer 35

A 25% pressure differencial for 30 seconds

Question 36

What is the purpose of the elevator feel shift module?

Answer 36

During a stall, it makes in more difficult to pull the control column back.

Question 37

Which LRU controls the yaw damper?

Answer 37

SMYD 1

Question 38

What is the maximum degrees of deflection the rudder can travel?

Answer 38

29 degrees until 137 knots.

Question 39

In relation to the yaw damper, what are the limitations for rudder movement?

Answer 39

With flaps up, 3 degrees of deflection.

With flaps down, 2 degrees of deflection.