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L3 Harris > AGK day 3 > Flashcards

AGK day 3 Flashcards

1
Q

If you lose one of the hydraulic system what should you do

A

Open the power transfer

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2
Q

If anything goes wrong what do you do

A

Check list

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3
Q

What is a single acting actuator

A

Convert hydraulic pressure into movement

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4
Q

What is a non return valve

A

Maintain flow direction in a single direction

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5
Q

How non return valves kept being non return

A

Different hole sizes

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6
Q

What are the two types of system on a hydraulic system

A

Passive and active

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7
Q

How does a closed centre system work

A

Maintains a constant supply that constantly pumps around the system

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8
Q

What is the hydraulic reservoir

A

Store for hydraulic fluid

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9
Q

Why is the hydraulic reservoir pressurised

A

As you increase the altitude the rate of evaporation increases but pressurisation stops this

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10
Q

Why is nitrogen used in accumulators

A

It does not combust

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11
Q

How may application of brakes can you use on the accumulator

A

6 applications

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12
Q

What is EDP

A

Engine driven pump

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13
Q

What drives hydraulic pumps

A

The accessory gearbox

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14
Q

What is a constant delivery pump

A

Flow rate dependent on speed of rotation of the gears

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15
Q

How does an automatic cut out value work

A

Works with constant delivery pump
Where he use of pressure will decide it it moves into the reservoir or to the system

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16
Q

How does a swash-plate pump work

A

A spinning pump that takes in fluid and is turned until the sliding shoe and he wish plate causes the piston to push out the pressure

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17
Q

What tuns the swash plate pump

A

Drive shaft

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18
Q

What is a hydraulic filter

A

Keeps fluid contamination free

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19
Q

What is pressure relief valve

A

Protects the system from over pressurisation by having the excess pressure have a spring causing a ball to unseat leading to it going back to the reservoir

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20
Q

What is a restrictor valve

A

Reduces fuel flow by having a one way restrictor that only allows one way flow

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21
Q

What is a shuttle valve

A

Two different supplies that works under two different pressures this means it one fails the other one Picts up

22
Q

How does a hydraulic fuse work

A

Protects from leaking hydraulic fluid by pressure differences
If the side of the equipment leaks the pressure will no longer be equal leading to the springs slamming shut and closing the normal passageway through the valve

23
Q

What psi does most systems operate at

A

3000 - 4000

24
Q

If you have a leak in the green reservoir what should you do

A

Cut off fuel to the engines because the pipe will be longest

25
Q

What is the most important part of the place if a total failure

A

The rudder

26
Q

What does a ram air turbine do

A

If a generator fails it pops out the bottom and turns to produce electricity

27
Q

What is an air turbine motor

A

High pressure bleed through a turbine which powers a hydraulic pump

28
Q

Why do Landing gears conduct static electric

A

They have a carbon content in the wheels

29
Q

What is the landing gear designed to do

A

Absorb the loads experienced on the airframe

30
Q

What is the standard landing gear for air transport planes

A

Tricycle landing gear

31
Q

What do spats do

A

Make a fixed gear more aerodynamic

32
Q

What is a nose gear

A

A two wheel landing gear

33
Q

What is a main gear

A

A two wheel landing gear with reinforcement

34
Q

What is a bogey gear

A

A four tyre plus landing gear found on the larger jets

35
Q

What absorbs the shock of landing

A

Shock absorbers

36
Q

What is the shock absorber made up of

A

The oleo strut
The gas acts as a spring
The oil dampens the spring action

37
Q

What is the oleo strut made up of

A

Hydraulic oil (DTD 585) and nitrogen gas

38
Q

What might an overly compressed oleo mean

A

Low gas pressure
Fluid leak

39
Q

Positives of the nose wheel attachment

A

Much lighter
Folds up so when moving it is being locked in
Shimmy protection

40
Q

What do down locks do

A

Ensure that accidental retraction cannot occur

41
Q

What are gear locks

A

Locks for the landing gear

42
Q

What are micro switches and proximity switches

A

Made for systems all linking together
Micro are mechanical
Proximity are electric

43
Q

When is an aircraft getting the most tortional load

A

When taxiing on the ground at tight angles

44
Q

What are the light sequences for gears

A

Green- gear locked down
Red- gear is unlocked
No lights- gear is in the up and locked position

45
Q

What is VLO (velocity landing gear operating)

A

The higher of the two speeds and allows for gear down ferry fight but watch out for increase fuel consumption

46
Q

What is VLE velocity landing gear extended

A

The lower speed and takes into account the aerodynamic forces on the gear and door mechanism

47
Q

What is he main emergency gear extension

A

A gravity or free fall system

48
Q

How does nose steering work in a light aircraft

A

Ruder pedal
Differential braking

49
Q

How does nose steering work in a light twin aircraft

A

Tiller

50
Q

How does nose steering work in large aircraft

A

Tiller can steer up to 75 degrees left or right
Body gear steering

51
Q

What is nose wheel shimmy

A

Uncontrolled vibration of the wheel

52
Q

What shimmy prevention is there

A

Hydraulically locking the steering piston
Double nose wheels
Self centering springs

L3 Harris (12 decks)

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