Flying Controls

Question 1

What is the purpose of the interlinked controls on the flying control system?

Answer 1

To compensate for the secondary aerodynamic effects of collective control inputs in the cyclic and yaw channels

Question 2

Locate: QRVDT

Answer 2

Lower fuselage, below right cockpit door

Question 3

Locate: Collective parallel actuator

Answer 3

Under cockpit floor midway between both collective levers

Question 4

Locate: Collective balance spring

Answer 4

Control frame left side, outboard of co-pilots collective lever

Question 5

Locate: Collective beam lever

Answer 5

Under and part of the MRGB

Question 6

The Quadruplex Rotary Variable Differential Transformer (QRVDT) is connected to which flying control system?

Answer 6

The collective control system only

Question 7

On the collective lever locate: Hoist control

Answer 7

Left of jettison switch

Question 8

On the collective lever locate: Wash Wipe

Answer 8

Right of jettison switch

Question 9

On the collective lever locate: Collective channel release

Answer 9

Hand grip left thumb

Question 10

On the collective lever locate: Mute/CWS test

Answer 10

Hand grip index finger

Question 11

Which aircraft system employs the parallel actuator fitted to the right collective lever layshaft?

Answer 11

The Automatic Flight Control System (AFCS) height hold

Question 12

What is the purpose of the collective parallel actuator when under the control of the Automatic Flight Control System (AFCS)?

Answer 12

To automatically operate the collective controls to adjust the collective lever when signal demands to the AFCS are greater than 25% of their authority

Question 13

What applied force will break the actuator shear pin and free the collective lever if the parallel actuator bearing becomes seized?

Answer 13

712 - 920 N

Question 14

Which function will no longer be available if the collective parallel actuator shear pin shears?

Answer 14

Automatic Flight Control System (AFCS) height hold

Question 15

What is fitted to the collective parallel actuator that allows the pilot to manually move the collective lever when the Automatic Flight Control System (AFCS) height hold is engaged?

Answer 15

A clutch

Question 16

Why is a collective balance spring fitted on the collective control system flying controls?

Answer 16

Supports collective lever weight when the pilot takes their hands off the controls

Question 17

In addition to the Health and Usage Monitoring System (HUMS) which other system is supplied with a signal from the collective Control Position Transmitter (CPT)?

Answer 17

Stick position indicator (part of the cockpit display system)

Question 18

What best describes the operation of the collective Main Rotor Actuator (MRA)?

Answer 18

Fixed ram, moving body

Question 19

How is control movement transmitted through the collective Main Rotor Actuator (MRA) when the flying controls are operated with the Automatic Flight Control System (AFCS) disengaged?

Answer 19

Via the main servo valve lever moving the main servo valve

Question 20

On the collective Main Rotor Actuator (MRA) if a loss of one hydraulic system occurs what is the reaction within the MRA?

Answer 20

The actuator functions as normal using the remaining hydraulic system (the failed system does not cause any restriction)

Question 21

On the cyclic stick hand grip locate: AFCS cutout

Answer 21

left side of hand grip (approx where right thumb is)

Question 22

On the cyclic stick hand grip locate: CAC cutout

Answer 22

Lever type switch on the underside of hand grip (approx where your two smallest fingers are)

Question 23

On the cyclic stick hand grip locate: PTT switch

Answer 23

Underside of hand grip adjacent to switch box (index finger)

Question 24

On the cyclic stick hand grip locate: CMDS manual release

Answer 24

Red circle on switchbox

Question 25

What is the purpose of the cyclic trim actuators?

Answer 25

To assist the pilot and reduce fatigue by holding the cyclic stick at a selected position

Question 26

The cyclic and collective Control Position Transmitters (CPT) are used by which system(s)?

Answer 26

Health and Usage Monitoring System (HUMS) and Cockpit Display System (CDS)

Question 27

What is the purpose of the yaw centring spring?

Answer 27

In the event of a pitch control failure (forward of the Yaw 15/16 lever) the spring hold a set pitch on the tail rotor blades to enable the pilot to effect a safe run on landing which is speed/weight dependant.

Question 28

Which Automatic Flight Control System (AFCS) signal demand condition will cause the yaw parallel actuator to operate and move the yaw pedals?

Answer 28

When demand is greater than 25%

Question 29

Which condition will cause the yaw parallel actuator to operate?

Answer 29

When Automatic Flight Control System (AFCS) heading hold is engaged and the system detects a heading deviation

Question 30

What type of tail rotor actuator is fitted to the aircraft

Answer 30

Dual tandem with no manual reversion

Question 31

How is Tail Rotor Actuator (TRA) operation affected due to the loss of an autostabiliser lane?

Answer 31

Automatic Flight Control System (AFCS) authority is reduced by a half

Question 32

Why is a collective to yaw interlink fitted on the flying control system?

Answer 32

To compensate for unwanted effects of pure collective inputs on lateral stability (heading) whilst in flight

Question 33

What does the compressing of the collapsible strut fitted within the collective to yaw interlink provide during application of a negative collective pitch condition?

Answer 33

Sense of feel when entering negative pitch

Question 34

Where is the master trim switch?

Answer 34

Overhead console left side

Question 35

Why is it important that the cyclic stick position is displayed to the pilot on the ground?

Answer 35

For flying controls to be trimmed to a minimum stress position

Question 36

On the stick position indicator what is the minimum stress position when the the collective is in sub minimum pitch?

Answer 36

+ 1.8° (forward)