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M15 GTE > Starting & Ignition System > Flashcards

Starting & Ignition System Flashcards

1
Q

What is the start lever used for

A

Switch fuel on/off and switch ignition on

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2
Q

What is the forward thrust lever for

A

Control thrust of an engine between idle and take off

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3
Q

What does reverse thrust lever do

A

Deflected doors are deployed and the airflow is deflected to give reverse thrust

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4
Q

What does master lever do

A

Control engine start sequence

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5
Q

When does hp valve open

A

When engine start lever moved up

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6
Q

how HP fuel shut off valve controlled

A

Mechanically

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7
Q

On the A320 how is HP fuel valve controlled

A

Electrically by engine master switch

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8
Q

Mechanical thrust control positions

A

Idle and take off

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9
Q

Where does mechanical thrust control transmit lever input signals to

A

fuel control unit on engine

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10
Q

Positions of reverse thrust lever

A

Reverse idle and full reverse thrust

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11
Q

What does a friction brake do

A

Uses internal friction to keep the throttle control system in a selected position

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12
Q

Why does a friction brake need to be strong

A

Strong enough to prevent movement from vibration

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13
Q

What switch activates thrust reversers

A

Micro switches below the centre pedestal

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14
Q

What system does foward system not have but reverse thrust system does

A

Reverse has throttle interlock system

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15
Q

What does the electrical thrust control do

A

Use electrical signals to transmit thrust demand signal from thrust control levers in cockpit to engine

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16
Q

What is a resolver

A

Electrical component that Coverts angular deflections of input lever to an electrical system

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17
Q

How may resolvers for each control lever

A

2

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18
Q

What does artificial feel do

A

Stimulate higher resistance

19
Q

What is start ignition used for

A

To begin combustion

20
Q

What is continuous ignition used for

A

Incase external conditions lead to flame out condition

21
Q

What does exciter do

A

Generates high voltage

22
Q

What provides sparks

A

Igniter plug

23
Q

What does igniter lead do

A

Transport electrical energy from exciter to plug

24
Q

What’s the purpose of a two igniter system

A

For safety purposes

25
Q

What are the two igniter systems

A

A & B system

26
Q

When are the A & B systems activated

A

During continuous combustion

27
Q

What part of the exciter should you never touch

A

During maintenance never touch output of ignition exciter including lead contacts

28
Q

What material are modern igniter plugs

A

Ceramic

29
Q

What should you check with igniter plus

A

Correct immersion depth

30
Q

What do two blue rings indicate

A

Toxic beryllium oxide

31
Q

How far can leads travel

A

Several meters

32
Q

What cools igniter leads

A

Air from engine compressor

33
Q

Why do we need to cool copper wire

A

Copper wire increases resistance when there’s a increase in temperature

34
Q

What 2 ways are starting systems controlled

A

Pneumatically or electronically

35
Q

Why is in flight restart needed

A

Saftey reasons on commercial aircraft

36
Q

starter motor operates through what gearbox

A

Engine compressor through accessory gearbox

37
Q

What’s higher idle & starter cut out speed or self-sustaining speed

A

Idle & starter cut out speed

38
Q

What starting system is used of commercial jet engines

A

Pneumatic

39
Q

What’s used to operate pneumatic starter motor

A

Bleed air from the apu , another engine or ground cart

40
Q

How is air supplied to starter motor

A

Starter air duct

41
Q

How is air supply switched off/on

A

Starter shut off valve

42
Q

Why is starter shut off valve in the lower are of engine

A

Easy access to maintenance crew

43
Q

What 2 ways is the starter valve controlled

A

Electrically by solenoid

Pneumatically operated by air pressure from starter duct

M15 GTE (19 decks)

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