Flight Controls

Question 1

1 RUD HYD

Answer 1

Indicates a loss of pressure at #1 rudder hydraulic actuator

Question 2

RUD PRESS

Answer 2

Failure of rudder pressure regulator to reduce to 900psi above 140KTS (150KTS) OR Failure of rudder pressure regulator to increase to 1500PSI below 140KTS (150KTS) OR System pressure is 3000PSI and airspeed exceeds 140KTS (150KTS)

Question 3

RUD FULL PRESS

Answer 3

Either rudder actuator is receiving 3000PSI above 140KTS (150KTS)

Question 4

What does illumination of a RUDDER PUSH OFF SWITCH LIGHT indicate

Answer 4

A jam in the #1 or #2 actuator linkage

Question 5

How does the STBY ELEV TRIM switch work

Answer 5

Guard is lifted which transfers control of pitch trim from AP to STDBY ELEVATOR TRIM SWITCHES

Question 6

What does the SPLR 1 light indicate

Answer 6

Indicates a jam in the inboard roll spoiler. The SPLR 2 light is for the outboard spoiler

Question 7

ROLL SPLR INBD HYD

Answer 7

Indicates a loss of hydraulic pressure in the related roll spoiler circuit

Question 8

What flight controls does the Pilots wheel control

Answer 8

Spoilers

Question 9

What flight controls does the Co-Pilots wheel control

Answer 9

Ailerons

Question 10

FLAP DRIVE

Answer 10

Failure of the Primary shaft. Flaps continue to operate using the secondary shaft

Question 11

FLAP POWER

Answer 11

Loss of hydraulic power to FPU.

Question 12

At what pressure will the FLAP POWER light come on

Answer 12

Less than 1500PSI

Question 13

When exposed to wind gusts what is the maximum speed of the gusts before an inspection is required

Answer 13

61KTS

Question 14

What degree of travel is allowed through the Nose Steering tiller

Answer 14

60 degrees either side

Question 15

What degree of travel is allowed with only rudder pedals

Answer 15

16 degrees LEFT and 18 degrees RIGHT

Question 16

How much can the rudder trim displace the rudder

Answer 16

10 degrees either side

Question 17

How is the rudder connected

Answer 17

Fore rudder is hinged to the vertical stabiliser and is moved by both actuators. Trailing rudder geometrically geared to fore rudder (twice the deflection)

Question 18

What controls hydraulic pressure with respect to the rudder

Answer 18

Pressure to each actuator is controlled by a Pressure Regulator that is connected to a Summing Unit upstream.

Question 19

What signals does the rudder pressure regulator use

Answer 19

Speed signals from the ADCs

Question 20

Other than a predetermined speed, how is the caution light RUD PRESS activated

Answer 20

There are pressure switches that are armed by the ADC speed signals in each actuators supply line

Question 21

What does pushing an illuminated PUSH OFF RUD 1 switch do

Answer 21

Depressurises the affected hydraulic actuator

Question 22

When is maximum fore rudder travel allowed

Answer 22

At flap settings of 15 and 35 degrees

Question 23

A mechanical rudder travel restrictor limits fore rudder travel to ____ with flaps at ____ degrees

Answer 23

12 degrees, 0 degrees

Question 24

Can the AP be engaged without the YD

Answer 24

No

Question 25

How much authority over the rudder does the YD have

Answer 25

5 degrees

Question 26

Can the YD be engaged without the AP

Answer 26

Yes

Question 27

Which side controls the Left Elevator

Answer 27

Pilots side

Question 28

How do the Elevators function

Answer 28

Each elevator has a torsion spring which drives the elevator surface in conjunction with a spring tab which reduces control forces

Question 29

What provides Elevator Trim

Answer 29

Tabs on each surface outboard of the spring tabs. Driven by a Trim wheel in the cockpit

Question 30

How does the Elevator trim work

Answer 30

Movement of the wheel sends a signal to the AP Trim Servo which moves the elevator

Question 31

How are the Spoilers controlled

Answer 31

Cable activated and hydraulically powered

Question 32

What are Aileron Tabs and how do they work

Answer 32

They are geared tabs on the trailing edge of each aileron that assist aileron deflection. The tabs are geared to move in the opposite direction (create a localised lifting force) to the aileron to assist in movement of the aileron

Question 33

How is Aileron Trim achieved

Answer 33

Through an electric actuator built into the right Aileron trim tab

Question 34

How do the Spoilers work

Answer 34

They respond differentially to control wheel movement

Question 35

Above \_\_\_\_KTS the _____ spoilers are inhibited

Answer 35

140KTS (150KTS), outboard

Question 36

If a roll spoiler jam occurs during a turn and the ROLL DISC handle is pulled, this may result in a partially extended spoiler. If the resultant counteracting aileron input is more than ____ the ____ switch light will illuminate

Answer 36

50 degrees, SPLR

Question 37

What is the maximum roll spoiler displacement with the ROLL DISC handle pulled

Answer 37

75 degrees

Question 38

What type of Wing Flaps are fitted to the DHC-8

Answer 38

Single slotted fowler flaps

Question 39

How are the flaps extended and retracted

Answer 39

A primary drive system which is actuated by a hydraulically powered Flap Power Unit (FPU) extends and retracts in response to flap selections

Question 40

Sensors in the flap selector provide flap selection to \_\_\_\_, ____ and \_\_\_\_

Answer 40

Landing Gear warning system, GPWS and AP lift computer

Question 41

How does the FPU work

Answer 41

1. Trigger is raised on the flap selector 2. Solenoid shutoff valve opens and admits hydraulic pressure to the FPU. 3. Valve remains open for 70 secs to allow FPU time to position flaps 4. A control valve is positioned by flap selector 5. Hydraulic motor (#1 system) in FPU rotates primary shaft through a gearbox 6. Travel limiting mechanism halts flap movement when desired position is attained

Question 42

Why would FLAP POWER caution light illuminate

Answer 42

Less than 1500PSI detected by a pressure sensor which is armed by the opening of the solenoid shutoff valve

Question 43

How many shafts drive the flaps

Answer 43

2, a primary and a secondary