Power instilations

Question 1

Where are engines installed

Answer 1

Inside the nacelle which gives aerodynamic smoothness and protects the engine components

Question 2

What damage is allowed in the nacelle

Answer 2

Small dents , limitations found in the amm

Question 3

What class are critical parts

Answer 3

Class 1 aerodynamic smoothness

Question 4

How do we get undisturbed airflow around the pylon

Answer 4

By specially shaped covers called fairings

Question 5

Air inlet cowling parts

Answer 5

Outer and inner barrel

Nose lip

Forward and aft bulkhead

Question 6

How is air inlet cowling connected to engine flange

Answer 6

By bolts & there are two index pins

Question 7

Why do some engines have unsymmetrical inlets

Answer 7

Use different air inlet cowlings on the left and right engine

Question 8

How are cowlings supported

Answer 8

Single or dual telescopic hold open rods

Question 9

Fan cowling latch angles

Answer 9

40-55

Question 10

What does fan reverse cowling do

Answer 10

Guides fan airflow in either forward or reverse direction

Question 11

How is cowling opened

Answer 11

Due to its weight it’s opened with assistance of hydraulic pressure from hydraulic hand pump

Question 12

How do we prevent blade tip rub

Answer 12

The cowling forming a stiff case to support structural stability

Question 13

How cowlings stiffened

Answer 13

V shaped grooves and blades

Question 14

What causes tip rub

Answer 14

High aerodynamic loads

Question 15

What are the two passive fire protection features

Answer 15

Fire protective coating & fire seal

Question 16

What material is the fire seal

Answer 16

Titanium with heat resistant silicon layer

Question 17

What does core cowling do

Answer 17

Covers the hot section of engine

Question 18

How is the core cowling sometimes combined

Answer 18

With the fan reverser cowling

Question 19

Exhaust nozzle components

Answer 19

Centre body & exhaust sleeve

Question 20

What uses a reduced exhaust signature

Answer 20

High bypass fan engines

Question 21

What material is the acoustic panel in low temperature areas

Answer 21

Lightweight composite

Question 22

What material is the acoustic panel high temperature areas

Answer 22

Fibrous-metallic materials

Question 23

When does pressure relive door open

Answer 23

Overpressure in compartment

Question 24

How is the pressure relief door held in a closed position

Answer 24

By a spring

Question 25

What are engines installed on

Answer 25

Pylon or engine strut

Question 26

How many engine mounts is there

Answer 26

2 mounts One fwd and one aft

Question 27

What axis does engine weight act on

Answer 27

Vertical or z axis

Question 28

What axis does engine thrust work on

Answer 28

Longitudinal or rotational axis

Question 29

What mount is engine thrust transferred by

Answer 29

Only by fwd mount

Question 30

What axis do side loads act in

Answer 30

Lateral axis or y axis

Question 31

What do vibrational and flight manoeuvres do negatively

Answer 31

Generate additional loads in all directions

Question 32

What loads do attachments bolts carry

Answer 32

Vertical engine loads

Question 33

How are thrust and side loads transferred

Answer 33

Shear pins

Question 34

What direction does fwd engine mount transfer forces

Answer 34

Y and z , which are weight and side loads

Question 35

What loads do aft mount transfer

Answer 35

Only vertical loads

Question 36

How is vibration and torque effects reduced on turboprop instillation

Answer 36

Resilient rubber mounts and links

Question 37

When would the mount be rejected during inspection

Answer 37

If cracking or pitting is found

Question 38

During inspection if anything is found it’s rejected apart from what

Answer 38

Surface corrosion dependent on amm instructions

Question 39

How do you identify bayonet design

Answer 39

Three separate threads

Question 40

What’s the standard method for removing wing mounted engines

Answer 40

Bootstrap method

Question 41

What the good and bad about crane sling method

Answer 41

30% less time then bootstrap method but needs expensive equipment

Question 42

How can you identify crane supported sling method

Answer 42

G shaped arm

Question 43

Good and bad about uplifter loader method

Answer 43

40% less time then bootstrap but needs expensive special equipment

Question 44

How are control lever knobs shaped and coloured

Answer 44

Differently for identification purposes

Question 45

What’s the final adjustment and alignment of control system

Answer 45

Control rigging

Question 46

How are rigging pins fitted

Answer 46

With a red flag

Question 47

If the same travel is made by two levers linked together what happens with the angle

Answer 47

The angle between them and interconnecting rod must be the same

Question 48

When control rigging why do we carry out engine run

Answer 48

Power check and synchronisation

Question 49

Why do engines need a drain system

Answer 49

Take all leakages of fluid directly overboard

Question 50

2 Main components of drain system

Answer 50

Drain lines & module assembly

Question 51

Where is the drain mast and what does it do

Answer 51

Lowest part of module and it carries fuel overboard

Question 52

Where are fluid leaks collected from

Answer 52

All Drive pad seals on gear box

Question 53

Where are most drain outlets found

Answer 53

On pylon

Question 54

What’s the most important outlet do

Answer 54

Drains fuel overboard

Question 55

Why is it important to have outler drain

Answer 55

So fuel leak from the main fuel supply can’t collect in the pylon and drip into engine

Question 56

How do drain lines end

Answer 56

At drain mast with a specific hole

Question 57

How is leakage flow

Answer 57

Horizontal due to airstream

Question 58

What does horizontal leakage flow do

Answer 58

Provide visable track on drain mast so u can identify the origin of leak

Question 59

How do u check if leakage is acceptable or not

Answer 59

By checking leak rate

Question 60

What do you use for a leak rate check

Answer 60

Collect fuel in small plastic bottle and compare to limits in amm

Question 61

What does a drain collector assembly do

Answer 61

A method of checking leak rates

Question 62

What happens when leak collector is full

Answer 62

Overflow into holding tank

Question 63

Where are holding tanks emptied

Answer 63

By ram air that enters on front side of drain mast

Question 64

What airspeed are tanks pressurised

Answer 64

200kts

Question 65

How are collectors emptied manually

Answer 65

Spring loaded drain valves

Question 66

What are fire walls made of

Answer 66

Steel and titanium