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M15 Lewis > 15.13 > Flashcards

15.13 Flashcards

1
Q

What does the servo mechanism that’s used to move the throttle levers also provide

A

Artificial feel and used as a friction brake

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2
Q

How many resolvers are there for each thrust control lever and what are there purpose

A

2
Conger an angular deflection of the input lever to an electrical signal

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3
Q

How man signals are sent from each thrust control lever and why

A

2
For safety

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4
Q

Who do electrical thrust control systems use to transmit thrust demand

A

Electrical signals

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5
Q

What’s the mechanical linkage called in the reserve thrust control system and what’s it do

A

Throttle interlock

Prevents pilot from increasing power until the reversers are fully deployed

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6
Q

What 3 tasks do thrust reversers have

A

Activate thrust reversers
Increase engine power
Block reverse thrust leaver while reverse moved from the stowed to the deployed system

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7
Q

What does the friction brake do

A

Makes internal friction to keep the throttle control system in the internal position

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8
Q

What does the thrust control system use to transmit the thrust over signal to the fuel control unit

A

Control roads
Cables
drums and pulleys
Flexible controls such as push pull cables

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9
Q

What are the two main positions for mechanical, thrust control system?
What are rage main positions for the thrust reverse levers?

A

Idle and take off thrust

Reverse idle and full reverse thrust

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10
Q

What controls the LP and HP valve in an airbus ac

A

Engine master switch

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11
Q

When is the Hp fuel valve open

A

When the engine start lever is moved up

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12
Q

What type of valves supply fuel and what drives them

A

Hp shut off valve (mechanically) ans LP shut off valve (electrically driven)

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13
Q

What switches in ignition ans fuel supply to combustion chamber

A

Engine start lever

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14
Q

What controls the engine start sequence

A

Master switches in the engine start panel

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15
Q

What happens when the thrust reverser lever is pushed up? Down?

A

Up- deployed
Down- stowed

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16
Q

What are the 3 main engine controls

A

Engine start controls
Fwd thrust control
Reverse thrust controls

17
Q

What controls the starter valve and how’s it operated

A

Controlled electrically by solenoid and operated pneumatically by air pressure from starter duct

18
Q

What can be used for pneumatic starting

A

APU, another engine or a ground cart

19
Q

Where on the engine is the starter shut off valve installed and why

A

Lower part of engine and for maintenance

20
Q

What’s faster idle and starter cut out speed or self sustaining speed

A

Idle ans cut out

21
Q

Whats does the start motor use to operate the compressor

A

Accessory gear box

22
Q

What does the engine starting system provide Incase of an emergency

A

In flight restarting

23
Q

What’s the purpose of the starter motor and what additional purpose of it does it have for maintenance purposes

A

To crank the engine/ manually move it
Operating the engine compressor to supply sufficient air to the combustion chamber

24
Q

What are the starting systems for GTE

A

Pneumatic or electric

25
Q

What is the purpose of the cool air in the ignition lead that runs along the core engine

A

Necessary as the copper wire increases its resistance to the temp

26
Q

What does the flexible conduit for an ignition lead do

A

Ground connection

27
Q

What are insulation materials made from now in igniter plugs in modern plugs?

A

Ceramic

28
Q

What are the two rings in the igniter plug made of ans what’s important to remember about handling

A

Beryllium

Toxic

29
Q

Why’s it Important to install the igniter plugs with the correct immersion depth

A

Gives safest and max operating life

30
Q

Why should you never touch he output of the igniter exciter

A

Because it could have a high voltage even after a long period after turning of power

31
Q

What supplies one of the ignition system

A

Emergency power

32
Q

How mint ignition systems are on engines and how are they labelled

A

2
A and B

33
Q

What’s are the main components of an ignition systems

A

Ignition exciter- generates high voltage
Igniter plugs- produces sparks from voltage
Ignition leads- transports electrical energy from exciter to plug
Electrical power supply

34
Q

Where can continuous ignition be turned on from

A

Engine control panel or ignition and starting panel

35
Q

When are continuous ignition systems turned on

A

When there’s a risk of flame out

M15 Lewis (18 decks)

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