M15.19

Question 1

What are engine firewalls made from?

Answer 1

Steel or titanium

Question 2

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

Answer 2

Thrust reverser cowling

Question 3

What are allowed in aerodynamic smoothness class 1?

Answer 3

Very small dents

Question 4

What areas of the engine nacelle has smoothness class 1?

Answer 4

The inlet and the outlet

Question 5

What areas of the engine nacelle has smoothness class 2?

Answer 5

The fan and reverser cowlings

Question 6

What is the only cowling that cant be split apart?

Answer 6

Air inlet cowling

Question 7

What cowling must always be opened first?

Answer 7

The fan cowling

Question 8

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

Answer 8

2 index pins

Question 9

What are the rods called that keep the cowlings open?

Answer 9

Hold open rods

Question 10

What cant happen hen the cowlings are open?

Answer 10

Towing of the aircraft

Question 11

What is the fan reverser cowling normally made from?

Answer 11

Steel and titanium

Question 12

How do you open the fan reverser cowlings?

Answer 12

With assistance from a hydraulic pump due to its weight

Question 13

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

Answer 13

• fire protective coating on the inner side

- fire seal on the connection to the fan frame

Question 14

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

Answer 14

Titanium with a heat resistant silicon layer

Question 15

When does the pressure relief door open?

Answer 15

When there is an overpressure which overcomes the spring

Question 16

What keeps the pressure relief door closed?

Answer 16

A spring

Question 17

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

Answer 17

A lanyard

Question 18

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

Answer 18

Check all the components behind the cowling for air leak

Question 19

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

Answer 19

Side-mounted engines

Question 20

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

Answer 20

Stabiliser-mounted engine

Question 21

How many engine mounts are there?

Answer 21

2

Question 22

What are the engine mounts called?

Answer 22

Forward mount and aft mount

Question 23

Where is the forward mount connected?

Answer 23

The fan frame

Question 24

Where is the aft mount connected?

Answer 24

The turbine frame

Question 25

What mount takes the thrust loads and why?

Answer 25

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

Question 26

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

Answer 26

By a resilient rubber mount which reduces vibration and torque effects

Question 27

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

Answer 27

It should be rejected

Question 28

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

Answer 28

It should be replaced

Question 29

How far should pipes be positioned from fixed structures?

Answer 29

6mm

Question 30

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

Answer 30

18mm

Question 31

How far should pipes be positioned from control cables?

Answer 31

25mm

Question 32

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

Answer 32

To prevent chafing from movement or vibration

Question 33

What are feeders?

Answer 33

Cables/wires that take power to or from components

Question 34

What is a connector?

Answer 34

A device that is semi-permanent between electrical cables

Question 35

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

Answer 35

Every 2inches

Question 36

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

Answer 36

6 inches

Question 37

What are the three methods for an engine change?

Answer 37

- bootstrap method - overhead crane supporting sling - uplift loader

Question 38

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

Answer 38

30%

Question 39

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

Answer 39

40%

Question 40

Why is the uplift loader mouthed not commonly used?

Answer 40

Needs expensive equipment

Question 41

Is a leakage acceptable?

Answer 41

Yes but check the AMM if its okay

Question 42

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

Answer 42

200knots