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H145 > Engines day 1 > Flashcards

Engines day 1 Flashcards

1
Q

OEi accumulated usage limit is how long?

A

10 minutes

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2
Q

What maintenance is a 1st Line Maintenance?

A

Scheduled and preventative, corrective/unscheduled (replacements of LRU)

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3
Q

What maintenance is a 3rd Line Maintenance?

A

Deep corrective maintenance which includes module repairs.

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4
Q

Who can do 3rd Line Maintenance?

A

Operator or Maintenance Facility holding specific license.

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5
Q

Where are the life limits for the engine found?

A

Ch.5 of the EMM

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6
Q

What are Life Limits expressed in?

A

Operating Cycles

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7
Q

What happens when a component reaches its Life Limit?

A

It must be scrapped.

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8
Q

Where is the maintenance information found?

A

Ch.71 of the EMM

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9
Q

What items are TBO?

A

Engine, Modules & Accessories

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10
Q

What items are Life Limits?

A

Cycles of Compressors and Turbines

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11
Q

Which phase of the engine has the highest temperture?

A

Combustion phase

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12
Q

How many Modules does the Arrial 2E have?

A

5

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13
Q

Centrifugal compression is made in which module?

A

Module 3

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14
Q

Which Line can a module be replaced?

A

2nd Line Maintenance

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15
Q

Which module has calibrated orifices to obtain a stable flame?

A

Module 3

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16
Q

What is the purpose of the calibrated orifices in the combustion chamber?

A

to obtain a stable flame, dilute and cool gases, and correce distribution of temperture on the gas turbine

17
Q

Which components are the rotating compnemts of the centrifugal compresor?

A

The wheel and the bearings

18
Q

What type is the combustion chamber ?

A

annular type combustion chamber

19
Q

How is the combustion chamber split?

A

In to two
- Primary air for mixing with fuel
- Secondary for obtaining a stable flame and cooling

20
Q

Where is the overall engine identification plate?

A

pitted on the L/H side of module M01 protection tube.

21
Q

What are the compressor wheels made of?

A

Titanium

22
Q

What is the speed of the Gas Generator (N1 shaft)?

A

52110 rpm

23
Q

What is the speed of the engine output shaft (N2)?

A

6000 rpm

24
Q

What is the temperture of the combustion chamber?

A

2500 C

25
Q

What is the temperature at the Gas Turbine?

A

1125 C

26
Q

Where are the engine mount vibration isolators installed?

A

at the fwd engine mount

27
Q

What is monitoring the condition of the IBFs?

A

AMC1&2

28
Q

What is the IBF filter frame made from?

A

Carbon Fibre.

29
Q

How many Px sensors in the IBF?

A

2, one before and one after the filter

30
Q

Where is the N1 speed measured?

A

on the alternator drive gear in the ENGINE ACC G.BOX

31
Q

Module 5 is what?

A

reduction gearbox

32
Q

How many stages of reduction is Module 5?

A

3 stage

H145 (20 decks)

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