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Module 15 > 15.19 > Flashcards

15.19 Flashcards

(60 cards)

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1
Q

Why would you use fuselage mounted power plants?

A

Thrust is close to the longitudinal axis

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2
Q

What is a firewall?

A

A partition between the engine and the aircraft

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3
Q

What are firewalls made out of?

A

Sheet metal shields made from stainless steel or any other heat resistant material

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4
Q

What two things form compartments?

A

Pylons and struts as well as engines

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5
Q

Why do engine pods in cooperate zones?

A

To minimise probability and spread of a fire

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6
Q

What are classified as fire zones?

A

Areas where ignition sources are present, and flammable fluid can leak

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7
Q

What else are isolated by firewalls?

A

Areas adjacent to the engine fire zone

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8
Q

Helicopters use firewalls to ensure that the engine is separated from what?

A

The gearbox or adjacent engines

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9
Q

What are the cowlings insulated with?

A

Fire resistant sheet foam

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10
Q

What are cowlings used in conjunction with to create a compartment designed to contain any fires or catastrophic?

A

Firewalls

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11
Q

What are fan and thrust reverser cowls used to do?

A

Protest engine from environment
Streamlines area
Designed to route cooling air around the engine and the components

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12
Q

What are the cowls constructed for mainly?

A

Ease of access

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13
Q

What is the cowling attached to?

A

The nacelle support frame

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14
Q

His is the cowling secured on the nacelle support frame?

A

On the 6 o’clock centreline by latches

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15
Q

What does the hinged cowl provide access to?

A

The engine core

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16
Q

What are the C duct also another name for?

A

The thrust reverser cowls

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17
Q

Once opened what are the C ducts supported by?

A

Hold-open rods

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18
Q

What are nacelles connected to the mounting strut by?

A

Hinge pins and stay fitted during engine removal

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19
Q

What are nacelles connected to the mounting strut by?

A

Hinge pins and stay fitted during engine removal

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20
Q

What can the translating sleeve be moved back and forth by?

A

Manually or by power when functional checks are required

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21
Q

What type of engine are acoustic panels used on?

A

High bypass ratio engines

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22
Q

What do acoustic panels utilise?

A

Noise absorbent liners around the inside wall of the bypass duct

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23
Q

Disadvantages of acoustic liners?

A

Add weight
Friction so increase fuel consumption

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24
Q

What are the C ducts also another cowls limed with to contain the noise of turbine/exhaust ?

A

Honeycomb panels

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25
In what direction must engine mounts allow expansion for?
Radial and axial
26
What is the purpose of the engine mounts?
Weight and thrust is transmitted to the aircraft structure and mountings
27
What is used to connect the side mounted engines to the rear and front saddle type beams?
Through fillets
28
How are the beams connected to the engine mounting points?
By swinging links and thrust trunnions with a thrust strut connected to the airframe
29
How are pylon mounted engines mounted to the pylon?
Front and rear brackets attached to links at the top, front and rear or the engine
30
How are pylon mounted engines mounted to the pylon?
Front and rear brackets attached to links at the top, front and rear or the engine
31
Where are the actual mounting points on a pylon mounted engine?
On the front (compressor casing) In the rear (turbine casing)
32
What loads do forward engine mounts take?
Vertical, side and axial (thrust) to allow for thermal expansion
33
What loads do the aft mounts take?
Vertical and side
34
What allows for expansion and torque in the main mounting bolt/trunnion?
Spherical bearings
35
What does the rubber bushing absorb?
Vibration
36
What are slinging points provided for?
Attachment of dedicated equipment for engine removal
37
What must you do to a fuel line when being routed near wiring to prevent it from chafing when not connected?
Route it below the wiring and clamp it to airframe
38
What must you avoid in flexible lines?
Tight bends
39
Where must wire bundles not be?
Anywhere where they can be used as a handhold or support for equipment
40
Wiring must be clamped low down for separation where?
Between the wire and the structure
41
Where the wires will touch structure, what can be used to prevent chafing?
Grommets and chafe strips
42
Where must wires not have a preload?
At corners and bends if grommets and chafe strips
43
Why must protective flexible conduits be made from a specific material?
To prevent chafing of internal wiring and inner walls
44
What must wiring be over hinged panels and why?
Wired and clamped to allow for twisting rather than bending
45
What must wiring be over hinged panels and why?
Wired and clamped to allow for twisting rather than bending when the panel is moved
46
What is the maximum radii for bends in wire groups or bundles?
Not less than 10 x the outside disaster if their largest wire
47
What is the maximum radii for bends in wires?
Not more than 6 x their outside diameter in breakouts
48
What is the maximum reverse direction?
6 x
49
What components remain within the aircraft when removing it?
Control cables and rods
50
Purpose of lifting points?
To safely lift up the weight of the engine
51
When is damage to the engine or surrounding structures most commonly occurred?
When lifting from a location that’s not the lifting points.
52
When is damage to the engine or surrounding structures most commonly occurred?
When lifting from a location that’s not the lifting points.
53
When are drains used?
In malfunction or normal operation
54
What does inspecting the drains achieve?
Open and clear from debris Allows engineer to know where the debris is coming from
55
What does inspecting the drains achieve?
Open and clear from debris Allows engineer to know where the debris is coming from
56
What are the main components of a drain system?
The drain lines which collect the fluid The module assembly where the drain lines end
57
What are the main components of a drain system?
The drain lines which collect the fluid The module assembly where the drain lines end
58
What does the lower part of the lower assembly consist of?
Drain mast
59
What is the drain collector assembly also known as and what does it do?
The manifold module and it keeps fluid leaks in small tanks
60
What does the drain line collect?
Fluid and vapour from points where lines may leak or where fluid can build up in cavities

Module 15 (18 decks)

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