Flight Controls

Question 1

How are flight controls actuated?

Answer 1

Mechanically - ailerons, elevators, rudder

Hydraulically - spoilers

Question 2

How many degrees can the control wheel rotate?

Answer 2

87 degrees left or right

Results in max aileron deflection of 14 degrees

Question 3

What powers aileron trim

Answer 3

DC emer bus

Question 4

How far can the aileron trim tab be moved?

Answer 4

6.7 degrees up or down

Takes approx 30 secs to obtain full roll trim travel

Question 5

What does the illuminated position lifht on the spoiler indicator mean?

Answer 5

The spoiler is not in the retracted position

Question 6

How can you disengage the pitch coupling mechanism?

Answer 6

By applying differential force on the control columns

The operating control column can then control its associated elevator

PITCH DISCONNECT on the CAP, master warning and CRC

Question 7

How far can the control columns travel?

Answer 7

11.25 degrees up and 6.75 degrees down

Results in 23 degrees nose up and 13 degrees nose down

Question 8

When will you get a PITCH TRIM ASYM light?

Answer 8

When the tab position differential exceeds a certain amount from each other

Master caution, FLT CTL light on the CAP

Will inhibit pitch control systems

Will cause ap to disengage

Question 9

How long does full pitch trim travel take?

Answer 9

Approx 30 secs

Max deflection is 5 degrees up and 1.5 degrees down

Question 10

What does the green band represent on th pitch trim indicator?

Answer 10

Represents the normal pitch trim position for take off

Band ranges from 2.5 degrees up to 0 degrees

Question 11

What is the stall protection?

Answer 11

Two stick shakers and one stick pusher attached to the captains control column

Question 12

When will you get a FAULT light on the stick shaker/pusher pb?

Answer 12

If the alpha probes disagree

If power for the stick pusher motor is lost

If flap position signal is incorrect

Question 13

What does the Releasable Centering Unit do? (RCU)

Answer 13

Centres the rudder when no forces are applied to the rudder pedals

Question 14

What does the Travel Limitation Unit do?

Answer 14

Limits the amount of rudder travel based on airspeed

Uses airspeed from the two ADCs

Question 15

What airspeed does the TLU work?

Answer 15

Automatic mode - when aircraft accelerates through 185 kt, removed when aircraft slows below 180 kt

Question 16

When does the RUD TLU LO SPD light illuminate green?

Answer 16

Whenever rudder travel is not limited

Question 17

Why will you get a TLU FAULT light?

Answer 17

• disagreement between actual position of the limiting fork and the commanded position
• dual ADC failure
• airspeed data disagreement between the two ADC
• TLU position synchronisation failure

Question 18

What does the yaw damper due?

Answer 18

• regulates rudder travel speed in flight
• limits excessive rudder movement due to wind gusts on the ground

Question 19

How long does full rudder trim travel take?

Answer 19

15 seconds

Question 20

What does the flap EXT flag mean?

Answer 20

• appears when flap valves is in the flaps extend position
• if it remains in view after the flaps are extended it indicates there may be a leak in the flaps hydraulic circuit

Question 21

When will the FLAP ASYM light illuminate?

Answer 21

If there is a difference between left and right inboard flaps that exceeds 6.7 degrees

Once this happens, flap lever is inop and can only be reset on the ground

Question 22

When will you get a FLP UNLK light on the CAP?

Answer 22

If flaps are extended and they retract more than 3 degrees without a flap retraction being selected

CRC, master warning and blue EXT flag

Question 23

When will the AIL LOCK illuminate?

Answer 23

In the event one of the aileron locking actuators disagrees with the position of the gust lock

Question 24

When can you engage the gust lock?

Answer 24

Can occur regardless of the position of the flight controls

Controls must be brought back to neutral to positively lock the locking mechanism

Question 25

What powers the stick pusher and stick shakers?

Answer 25

Stick pusher - DC Bus 1
Stick shaker - the associated DC bus

Question 26

When will the TLU FAULT light illuminate?

Answer 26

• system disagreement
• dual ADC failure
• inconsistent ADC data
• failure of the TLU position synchronisation system

Question 27

How is aileron trim achieved?

Answer 27

By repositioning the neutral point of the left aileron spring tab

Question 28

How is aileron trim achieved?

Answer 28

By repositioning the neutral point of the left aileron spring tab