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M15 > M15.19 > Flashcards

M15.19 Flashcards

1
Q

What are engine firewalls made from?

A

Steel or titanium

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2
Q

What are the fan reverser cowling and the core cowling sections sometimes called?

A

Thrust reverser cowling

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3
Q

What are allowed in aerodynamic smoothness class 1?

A

Very small dents

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4
Q

What areas of the engine nacelle has smoothness class 1?

A

The inlet and the outlet

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5
Q

What areas of the engine nacelle has smoothness class 2?

A

The fan and reverser cowlings

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6
Q

What is the only cowling that cant be split apart?

A

Air inlet cowling

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7
Q

What cowling must always be opened first?

A

The fan cowling

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8
Q

What is used to make sure the air inlet cowling is installed properly?

A

2 index pins

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9
Q

What are the rods called that keep the cowlings open?

A

Hold open rods

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10
Q

What cant happen hen the cowlings are open?

A

Towing of the aircraft

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11
Q

What is the fan reverser cowling normally made from?

A

Steel and titanium

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12
Q

How do you open the fan reverser cowlings?

A

With assistance from a hydraulic pump due to its weight

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13
Q

What are the two passive methods cowling give protection from fire?

A
  • fire protective coating on the inner side

- fire seal on the connection to the fan frame

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14
Q

What is the fire seal of the fan thrust reverser made from?

A

Titanium with a heat resistant silicon layer

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15
Q

When does the pressure relief door open?

A

When there is an overpressure which overcomes the spring

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16
Q

What keeps the pressure relief door closed?

A

A spring

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17
Q

What stops the pressure relief door from flying away during flight?

A

A lanyard

18
Q

What must be done if a pressure relief door is found opened?

A

Check all the components behind the cowling for air leak

19
Q

What are engines called when mounted on the left or right of the aft fuselage?

A

Side-mounted engines

20
Q

What is an engine called when it is in the tail section?

A

Stabiliser-mounted engine

21
Q

How many engine mounts are there?

A

2

22
Q

What are the engine mounts called?

A

Forward mount and aft mount

23
Q

Where is the forward mount connected?

A

The fan frame

24
Q

Where is the aft mount connected?

A

The turbine frame

25
Q

What mount takes the thrust loads and why?

A

The forward mount takes the loads because of axial thermal expansions of the engine can be more than 20mm

26
Q

How is a turbo-prop engine secured to the upper nacelle structure?

A

By a resilient rubber mount which reduces vibration and torque effects

27
Q

What should happen if cracking or pitting is found on the engine mount?

A

It should be rejected

28
Q

What if heat or fluid deterioration is found on the turbo-prop resilient rubber?

A

It should be replaced

29
Q

How far should pipes be positioned from fixed structures?

A

6mm

30
Q

How far should pipes be positioned from control and rigid moving parts?

A

18mm

31
Q

How far should pipes be positioned from control cables?

A

25mm

32
Q

Why are pipes required to be a certain distance away from certain lines?

A

To prevent chafing from movement or vibration

33
Q

What are feeders?

A

Cables/wires that take power to or from components

34
Q

What is a connector?

A

A device that is semi-permanent between electrical cables

35
Q

How far apart should bundling of a wire take place in an engine?

A

Every 2inches

36
Q

When a wire enters a connector, what is the distance from the last tie?

A

6 inches

37
Q

What are the three methods for an engine change?

A
  • bootstrap method
  • overhead crane supporting sling
  • uplift loader
38
Q

What percentage of time is crane support sling method quicker than bootstrap method?

A

30%

39
Q

What percentage of time is the uplift method quicker than the bootstrap method?

A

40%

40
Q

Why is the uplift loader mouthed not commonly used?

A

Needs expensive equipment

41
Q

Is a leakage acceptable?

A

Yes but check the AMM if its okay

42
Q

How fast should the airspeed be to force all the leaked fluid out the drain collector?

A

200knots

M15 (15 decks)

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