Flight controls

Question 1

LE devices?

type & number

Answer 1

4 x flaps

8x slats

Question 2

LE flaps & slats

number & position each wing

Answer 2

2x flaps inboard

4x flaps outboard

of each engine

Question 3

Normal landing flap positions

Answer 3

15
30
40

Question 4

TE flaps

number & position

Answer 4

double slotted flaps inboard & outboard of each engine

Question 5

speed brakes

consist of?

number & position

Answer 5

Flight & ground spoilers

ground = 4.
2x on upper surface of each wing

flight = 8
4x up surface of each wing

Question 6

can speed brakes be used on ground & in air?

Answer 6

Flight & ground spoilers on ground

flight only in air. (used symmetrically for braking & alternately for turning)

Question 7

what do the A & B FLT control switches control?

Answer 7

Hydraulic shut off valves

will isolate each aileron, rudder & elevator from related hydraulic system pressure.

Question 8

what’s cpt control wheel.connected to?

what’s FO control wheel connected to?

Answer 8

by cables to Aileron power control units (PCU’S)

by cables to spoiler PCU’S

Question 9

if total hydraulic failure, can aileron still be used?

Answer 9

yes

mechanically positioned.
however control forces will be greater.

Question 10

if ailerons or spoilers are jammed?

Answer 10

because they are all connected you will be able to feel which side (cpt or FO) is jammed & which side can still provide roll control via respective remaining surface.

Question 11

can aileron trim be used with AP on?

Answer 11

it can be applied, but the AP will over power it. There will be no indication shown on scale & when AP is released there may be an abrupt roll

Question 12

what are flight spoiler powered by?

how many are there?

Answer 12

Each hydraulic system A & B is dedicated to a different set of spoiler pairs = ensures symmetry in case of hyd failure.

4x on each wing

Question 13

can you shut off spoilers?

Answer 13

yes

Hyd px can be removed with two SPOILER switches

Question 14

when will flight spoilers activate to assist in rolling?

Answer 14

when control wheel is displaced more than 10°

Question 15

elevator powered by?

Answer 15

Hydraulic system A & B

via power control units (PCU) connected with cables to control column

Question 16

control of elevator after total hydraulic loss?

Answer 16

can be mechanically positioned.

forces will be higher.

Question 17

stabiliser powered by?

Answer 17

electrically by AP or manual trim.

Question 18

elevator/control column jam?

Answer 18

override mechanism allows columns to be separated by force.

travel of elev is reduced but enough for control & flare

forces will be higher but stab trim can be used to assist

Question 19

elevator feel system.

what is it?

what it uses?

failure?

Answer 19

elev feel computer simulates aerodynamic forces using airspeed & stab position.
transmitted to column by feel & centering unit.

Hyd sys A or B px used (whichever higher)

if hyd or feel sys fails? = excessive diff hyd px is sensed & FEEL DIFF PRESS light on

Question 20

automatic speed brake ground operation

under what conditions?
6

Answer 20

• speed brake lever = Armed
• speed brake ARMED light = on
• RAD ALT is less than 10feet
• Landing gear strut compresses on touchdown.
• both thrust levers retarded to idle
• main landing gear wheels spin up (more than 60kts)

(any landing gear strut compression = spoilers can deploy.
Right main gear = ground spoilers to deploy)

Question 21

If speed brake lever in DOWN position during landing, will spoilers deploy?

Answer 21

yes if

• main landing gear wheels spin up (more than 60kts)
• both thrust levers retarded to idle
• reverse thrust levers are positioned for reverse thrust