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ACFT tech Systems > ACFT SYS WED > Flashcards

ACFT SYS WED Flashcards

1
Q

What are the power sources for the essential push bat and which provides power during normal AEO operations

A

Generator
Battery as backup

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2
Q

Can the gen/starter operate dual function concurrently

A

No
Operates as starter until N1 is %50 then provides power N1>50%

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3
Q

Where does the starter get its power from for starting the engine?

A

Battery, EPU or other generator

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4
Q

Purpose of the busbar

A

Acts as powerboard to distribute power

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5
Q

In normal AEO operations where do the shedding busbars receive power

A

The generators through primary busbars

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6
Q

The batter provides _______ volts in DC power

A

24

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7
Q

The type of battery

A

Nickel Cadmium

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8
Q

Battery’s master box function

A

Control and monitor operations of the battery

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9
Q

The avionics master switch connect power to give avionics sections of which buses

A

Essential bus 1 and 2, avionics shed bus 1 and 2

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10
Q

If a generator fails or a bus tie is opened which busbars are automatically disconnected

A

High load busbars

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11
Q

Gen 1 and gen 2 switches are located on the

A

Engine switch assembly

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12
Q

Does the battery need to be connected before EPU?

A

Yes to prevent damage

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13
Q

How many generators have to fail before the shedding buses are automatically disconnected

A

2

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14
Q

What cockpit switch allows reconnection of shedding buses

A

SHED BUS

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15
Q

DC power is converted to AC power by the use of an ____

A

Inverter

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16
Q

The inverter is referee for as #2 as it receives its DC power from?

A

Essential busbar 2

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17
Q

The inverter converts 28VDC into what VAC and at what frequency

A

26 VAC 400Hz
115VAC 400Hz

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18
Q

What ACFT components require AC power

A

AHRS1
Roll SAS
wether radar
Ice detector
Pitch SAS

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19
Q

The two hats EC135 high power electrical consumer are the _____

A

Aircon
Winch

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20
Q

The winch receives its power from the ______ primary bus

A

1

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21
Q

What is the primary role of the main rotor drives

A

Transmit power from both engines to the main and tail rotors and auxiliary units

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22
Q

What do the flexible couplings at each end of the engine drive shaft do?

A

They correct misalignment between the engine outputs and the main transmission inputs

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23
Q

What do the 2 freewheel units provide to the transmission

A

They prevent a reverse power flow from the main transmission to the engines

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24
Q

What component if located between the tail rotor drive shaft and the main transmission

A

Rotor brake disc adapter

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25
Q

What is the primary role of the main transmission gearing

A

It reduces input RPM to main rotor, tail rotor and accessories

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26
Q

What type of sump system does the main transmission have and what are the oil systems primary functions

A

Wet sump oil system for lubrication and cooling

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27
Q

How many oil pumps does the main transmission oil system have and why

A

2 pumps in lower gearbox casing for redundancy

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28
Q

What does a main transmission oil filter pop-up button extension mean? Actions?

A

Pre clogging indicator and you should tell maintenance

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29
Q

Where are the oil coolers mounted?

A

Directly abeam and either side of the main transmission

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30
Q

What draws the air to the oil cooler for cooling

A

The cooler fans driven by the main transmission accessory drive

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31
Q

How many chip detectors are there in the main transmission lubrication system and where are they?

A

1 which is fitted in the 1 common suction line for both oil pumps

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32
Q

How do you check the oil level of the main transmission and what if the level is outside limits

A

Check oil sight glass on RH side of transmission and advice maintenance

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33
Q

How do we active the rotor break in the aircraft and when?

A

Pull down rotor break leaver, located in the overhead panel
50%rpm and when both engines shut down

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34
Q

How much time in between rotor break applications?

A

10 minutes minimum

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35
Q

Parameters for ROTOR BRK caution on CAD

A

Break engaged and rotor turning

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36
Q

What does the main transmission accessory drive operate?

A

Hydraulic pumps and oil cooler fans

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37
Q

Where is the rotor break attached and what is its primary function?

A

Attached between the tail rotor drive shaft and the main transmission. Enables rotors to be stopped

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38
Q

How is the main transmission connected to the airframe?

A

By 4 ARIS mounts, 2 torque struts and one side load strut

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39
Q

What is the main purpose of the main transmission mounts

A

The transmit the main rotor forces and moments into the helicopter airframe

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40
Q

What is the purpose of the ARIS system

A

A spring/mass damper used to isolate vibration between the rotor system and the fuselage

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41
Q

What is the purpose of each emergency stop mounted above each damper?

A

Supports transmission if the primary bellows of the ARIS fail

42
Q

Where is the mass/spring damper (oscillation dampener) and what does it do

A

Located in the fuselage under the co pilot seat, compensates for lateral vibration by being 180• out of phase

43
Q

The purpose of the tail rotor drive system

A

Transmits the power from the main rotor transit the tail rotor

44
Q

Purpose if the tail rotor gear box

A

-Drive tail rotor
-Reduce the speed from the drive shaft
-Divert the direction of power flow through 90• by means

45
Q

Is the tail gear box equipped with an electrical chip detector which indicates on the CAD

A

Yes

46
Q

The last 20ft of the hoist cable is what colour

A

orange.

47
Q

the pyrotechnic cable put can be initiated from buttons located on?

A

ACMNs hoist control pannel
Pilot/co-pilot collective head

48
Q

If the pyrotechnic cutter failed what else could be used to cut the cable

A

hand cable cutter

49
Q

hoist cable breaking strength is

A

3330 pounds

50
Q

total length of hoist cable

A

90m

51
Q

who are winch abnormalities reported to?

A

maintenance

52
Q

which crew can move the hoist boom in and out and raise/lower cable

A

All

53
Q

time to fully extend/retract boom is?

A

7.5s

54
Q

where is the pilot hoist control located

A

collective leaver

55
Q

state the pilot actions required to winch. cable up and down and move winch boom in and out?

A

push HAT on collective in an up/down to let out wire. left/right to extend boom

56
Q

when the hoist boom is fully out what is the angular position in relation to the ACFT

A

62 degrees

57
Q

what unit is used for the cable read out

A

meters

58
Q

how is power applied to the hoist system?

A

through selecting ockpit switch to CC-ARM / ON

59
Q

the WINCH CABLE CUT switch in the cockpit, when placed to CC-ARM ON position initiates power supply to the external hoist system and will cause which caution to appear

A

CA- CUT ARM

60
Q

with the rear hoist control button selected to STBY, will the operator be able to raise/lower the hoist cable? Move hoist boom

A

Cable - No
Hoist - Yes

61
Q

how will ACMN kow that the hoist has power

A

CAUTION and overheat light will flash for 2 seconds. Rear cabin HOIST/STBY lights illuminate

62
Q

With dual engine failure can the hoist be raised electronically

A

Yes, but will drain the battery time

63
Q

The red collar on the winch control CB “is/is not” required for flight

A

Is

64
Q

during a single generator failure, can you complete a hoist cycle

A

Yes, other generator can supply 60 AMPS (will be slower)

65
Q

maximum hoist load

A

249kg

66
Q

max winch cable angles

A

30 in vertical flight
15 in hover

67
Q

define hoist cycle

A

the extension and subsequent retraction of 16ft/5m

68
Q

what is the max speed of the hoist with 600lb load and 300lb load

A

600-150ft/m
300-200ft/m

69
Q

during hoist operations where is the cable length read-out displayed for the pilots

A

VEMD

70
Q

what is the max speed of the hoist

A

250ft/minute

71
Q

where is the pilots electrical release mechanism located

A

cyclic, top right

72
Q

what is the max speed during hook operations

A

100k or VNE

73
Q

for HATS what is the cargo hook max load

A

1300kg

74
Q

state 3 available release mechanism to release cargo from the hook

A

electrical, mechanical, manual

75
Q

define hook cycle with load upon the hook

A

either manual or electrical release action, while load is acting upon the hook is 3 cycles

76
Q

where is the mechanical hook release handle located

A

Pilot (RHS) collective lever underneath

77
Q

when the HOOK UNLD light is green on the CAD what does this mean

A

power is being supplied
load is less then 5kg

78
Q

where is the cargo hook central pendant located

A

centre console deck level

79
Q

can you electrically release tge load from the co-pilots position

A

yes, only mechanical cant be done from LDS

80
Q

Hot air for the heating system originates from where

A

Engine

81
Q

the cockpit area can receive heated air from which 3 orifices

A

door frame louvres
cockpit nozzle
windscreen ducts

82
Q

what does BLD HTG switch allow when set to the EMER position

A

operation of the heater when OEI

83
Q

what does HTG OVTEMP caution indicate

A

heater system over temp switch activated, bleed air shut-off valve closes to mixing valve

84
Q

the air distribution know on the centre must be set to ___b for heated air to be directed to windscreen ducts

A

Defog

85
Q

The PAX/BLW switch has how many positions?

A

3 (on, off, enable)

86
Q

PAX/BLW switch set to on the PAX blower will run at ____ speed

A

100%

87
Q

PAX/BLW switch set to the Enable position the blower will run at ____ speed

A

variable speed

88
Q

CPDS OVHT caution will appear at ___ degrees

A

55

89
Q

when will the cockpit blower automatically activate and what indication will you get on CAD

A

45 and no indication

90
Q

the air conditioning compressor is powered by?

A

the main gear box

91
Q

An additional component added with the air conditioning systems was the addition of cockpit and cabin ____ assemblies

A

Evaporator

92
Q

In order to run the AC safely the VENT SYS rhetrostat must be set to?

A

ON

93
Q

AC will automatically disengage when ___ switch is actuated for hoist ops

A

CABLE CUT - ARM

94
Q

max airspeed for windscreen wiper

A

80 KIAS

95
Q

when should ice detection system test be carried out

A

after engien start is OAT<5 degrees

96
Q

where are the windscreen wiper switches located

A

on the overhead console and cyclic head

97
Q

windscreen wipers should only be operated when windscreen is ____

A

wet

98
Q

Ice detection system aspirator is driven by ____ air from the engines

A

bleed

99
Q

ice rating sensor needs how long to cool down?

A

10 minutes

100
Q
A

ACFT tech Systems (4 decks)

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