ACFT SYS TUESDAY

Question 1

The collective pedals change the main rotor blades ___ and at the dame _____

Answer 1

collectively
time

Question 2

what does the control rode with the white band correlate too?

Answer 2

Collective

Question 3

what does the control rode with the red band correlate too?

Answer 3

Roll - cyclic

Question 4

what does the control rode with the black band correlate too?

Answer 4

pitch - cyclic

Question 5

Function of the swashplate assembly

Answer 5

convert stationary control inputs into rotating outputs

Question 6

the collective form will lift up which swahsplates during when collective is raised

Answer 6

Stationary (control ring) and rotating (bearing ring)

Question 7

what components transmit the control inputs from the rotating swashplate to the main rotor blades

Answer 7

4 rotating control rods

Question 8

the middle mixing unit is the ____ fork

Answer 8

collective

Question 9

Main Rotor system consist of?

Answer 9

bearing-less, hing-less 4 blade main rotor

Question 10

What function does the mast moment indicator provide

Answer 10

rotor mast bending

Question 11

by bending and flexing the main rotor blades Flex beam, allows each blade to

Answer 11

flap, feather, lead, lag

Question 12

what features enables the discharge of static electricity from the helicopter

Answer 12

static discharger riveted to the trailing edge in the blade tip area
electrical conductive strap

Question 13

what sorty of rotor system does the HATS EC135 have

Answer 13

hing-less, bearing-less, 4 blade rotor head

Question 14

the ____ cable transmits the control movements from the pilots bell-crank to the duel yaw actuators in the fenestron structure

Answer 14

flexball

Question 15

tail rotor control unit performs the function of a ___ for tail rotor

Answer 15

swashplate

Question 16

the shrouded fan-in-fin desighn includes ____ small blades spinning at high speed

Answer 16

10

Question 17

how does the shrouded configuration improve efficiency

Answer 17

decreases drag

Question 18

the trim system provides artificial control feel to the cyclic system through the use of

Answer 18

Force gradient springs

Question 19

what is the direction of the main rotor and what is the reaction

Answer 19

counterclockwise rotation, clockwise torque reaction

Question 20

what flight control actuator will no longer be boosted with the loss of #2 HYD system

Answer 20

tail rotor

Question 21

both hydraulic pumps are driven by ____

Answer 21

Transmission accessory drive gearbox

Question 22

minimum HYD reservoir display

Answer 22

50%

Question 23

With the HYD test switch selected to SYS 2 what cockpit and flight control indicators would you expect to see or feel?

Answer 23

SYS 1 Caution
Nil changes to flight control feel

Question 24

HYD test switch is only to be used?

Answer 24

On the ground

Question 25

what ACFT control system can provide an input into an EHA

Answer 25

auto pilot and SAS

Question 26

where no control input is present in a follow up HYD system, which component blocks the pump pressure from reaching the boost cylinder

Answer 26

The control spool

Question 27

the pitch, collective and roll hydraulic actuators are ____ stage actuators

Answer 27

dual

Question 28

which hydraulic system supplies the electro-hydraulic component of the EHA's

Answer 28

HYD system 1

Question 29

what type of hydraulic actuator does the collective have and what is its location within the main rotor hydraulic pack

Answer 29

MHA, in the middle

Question 30

How many boost pistons are there in a single EC135 MHA/EHA

Answer 30

1

Question 31

Loss of the #1 HYD system will result in a degradation of the ___ and ____ stability Augmentation channels

Answer 31

Pitch and Roll

Question 32

Why do HYD systems work

Answer 32

liquids do not expand

Question 33

what does the engine provide for the aircraft

Answer 33

TQ, bleed air, electrical power

Question 34

Is the gas generator shaft connected to the power turbine shaft?

Answer 34

No

Question 35

basic principle of the Turbomecca ARRIUS Engine

Answer 35

suck squeeze bang blow

Question 36

what does N1 figure on the VEMD indicate

Answer 36

gas generator rpm as a %

Question 37

What N is the power turbine referred to?

Answer 37

N2

Question 38

which shafts drive the reduction and accessory geartrains respectively

Answer 38

N1 for accessory geartrain (gas turbine) n2 for reduction gear train (power turbine)

Question 39

where is N2 displayed in the cockpit

Answer 39

VEMD

Question 40

what does the N2 needle on the triple tacho indicate

Answer 40

the power turbine rpm as a %

Question 41

what is the purpose of the reduction geartrain

Answer 41

reduces the power turbine speed to an appropriate speed for the main transmission

Question 42

what is the purpose of the accessory drivetrain

Answer 42

to provide the appropriate speed reduction for the engine accessories

Question 43

what items does the engine accessory drivetrain drive?

Answer 43

alternator, starter/generator, oil pump and fuel pump

Question 44

when acting as a starter the starter/generator will turn which "N"

Answer 44

N1

Question 45

what is the purpose of the oil system

Answer 45

temp reg and lube

Question 46

what does "ENG CHIP" mean on the left side of the CAD?

Answer 46

ENG 1 has metal particles caught by one of the 2 magnetic plugs

Question 47

how many times can we use the ENG CHIP switch

Answer 47

once per indication

Question 48

what are the oil cooling fans driven by?

Answer 48

the main transmission

Question 49

This pump draws oil from the tank and delivers it to the engine areas that require lubrication and cooling

Answer 49

pressure pump

Question 50

how many pressure v scavenger pumps?

Answer 50

1 pressure, 2 scavenger

Question 51

what is the purpose of the IBF

Answer 51

protect compressor blades by removing foreign objects such as sand from the engine inlet system

Question 52

where do we get info for the ibf in cockpit

Answer 52

clogging info on rear centre console

Question 53

are the electric bypass doors normally open or closed?

Answer 53

closed

Question 54

what happens to the IBF bypass doors if an engine failure occurs?

Answer 54

the failed engine will stay closed and the running engine will open

Question 55

what is the purpose of the Fuel pump unit?

Answer 55

supplies fuel under the conditions set by FADEC

Question 56

what are the engine fuel pumps driven by

Answer 56

driven by N1 geartrain and are located on the front face of the reduction gearbox

Question 56

FUEL FILT on right side meaning

Answer 56

impending opening of the #2 engine by-pass door due to clogged filter element

Question 56

how many and what type of fuel injectors?

Answer 56

12: 1 preferred 2 starter 9 main

Question 57

when do the main injectors take over?

Answer 57

when N1 is 50%

Question 58

what is different about the preference injector

Answer 58

in low fuel enviro it is the only injector that will continue supply

Question 59

what are the 3 different fuel metering modes

Answer 59

auto - EECU only manual - twist grip mixed - EECU and twist grip

Question 60

which twist grip controls which engine?

Answer 60

Top/lines = left bottom/ bumpy = right

Question 61

collective button to stop fuel

Answer 61

OFF or STOP MIN FUEL

Question 62

what controls the engine start sequence

Answer 62

the EECU

Question 63

at what N1 does the ignition system shut of during start up?

Answer 63

50%

Question 64

how much voltage and where does it come from for the ENG start sequence

Answer 64

24VDC, EPU or other engine generator

Question 66

Besides FADEC malfunction, what 2 methods can take the engines out of auto mode

Answer 66

Twist grip moves from neutral or engine mode select switch set to MAN

Question 67

If we had double generator failure, would FADECS stop working

Answer 67

No, the alternator from the accessory gear train provides power to the FADEC regardless of generator output

Question 68

If the engines were running, what would happen if you turned the engine control panel FADEC switch off

Answer 68

FADECS remain on. at grater then 50% N1 the FADECS are powered by the Alternatir which is driven directly from the accessory gear train. The engine control panel switch only provides power to theFADEX for engine start when the accessory drive isn’t driving the alternator.

Question 69

What does VENT/OFF switch do

Answer 69

The starter/generator will run up the gas generator assembly approx 20% N1, but the engine ignition system is deactivated and the fuel remains shut off

Question 70

What happens to the fuel flow of an engine if it is entered into manual mode

Answer 70

It freezes at the current point

Question 71

Components of FADEC

Answer 71

EECU and twist grip

Question 72

What is the FADECS primary task?

Answer 72

Controls the corresponding turbo-shaft engine and provides the interface to the other FADEC as well as to the aircraft for data interchange

Question 73

What are the FADEC primary functions

Answer 73

Fuel supply, auto engine control, auto torque matching, engine and power monitoring, power turbine over speed protection, governs Nr according to DA

Question 74

What is the crosstalk capability and what does it provide for us

Answer 74

Allows engines for cross reference each other and detects manual mode, OEI, training activation…

Question 75

At what point during the engine start does the ignition system deactivate and the engine becomes self sustaining?

Answer 75

50% N1

Question 76

When do we turn engine fuel prime pumps off

Answer 76

IAW checklist When the engines are IDLE/ Self sustaining before advancing to flight

Question 77

What is meant by the term power sharing

Answer 77

When the system governs and optimises the performance of the engines and adjust relative to each other. The N2 datum is set N2 set to 100.5% under normal flight conditions

Question 78

At what DA does N2 automatically increase

Answer 78

DA from 4500-9500ft the N2 speed is automatically increased from 100.5% to approx 103.5%

Question 79

If you beep the ENG TRIM switch on the collective to the left, what occurs

Answer 79

The TQ on the LH (ENG 1) accelerates and the RH (Eng 2) decelerates

Question 80

Which collective twist grip controls the RH engine

Answer 80

The bottom twist grip

Question 81

What 2 things are required to return the engine fuel system back into the normal auto mode

Answer 81

NORM overhead panel, neutral twist grip

Question 82

How can you manually shut off the fuel to an engine using twist grips

Answer 82

Pressing OFF or STOP MIN FUEL and fully winding twist grip

Question 83

What is droop compensation and how does it work

Answer 83

To prevent a decrease of Nr the FADEC anticipates the situation using signals from the LVDTs

Question 84

If HI Nr is selected, what airspeed does it active/deactivate

Answer 84

Activate 50k Deactivate 55k

Question 85

Where does the HI Nr revive its airspeed data from? What occurs if it’s blocked

Answer 85

ADC Hi Nr turns on

Question 86

How could the pilot change the 30s to 2m power rating when OEI

Answer 86

Via the topping switch on collective

Question 87

What happens to torque as Nr slows from 95%and 90% Nr is OEI

Answer 87

For every 1% increase in TQ Nr will decrease 1%

Question 88

What does the CVFDR and HUMsdo in the aircraft

Answer 88

Record ACFT flight data which enables accurate flight data record collection