M15.19 Flashcards
What are engines installed inside of?
A nacelle
What damage is allowed in a class 1 aerodynamic smoothness area?
Only small dents
What is the inlet cowling connected to and how?
To the engine flange by bolts
What do the 2 index pins do?
Ensures the inlet cowling is mounted in the correct position before bolting it down
The fan cowling covers what?
Stator case and accessories gearbox
What are C-ducts?
The 2 ducts that fan air passes through in the reverser cowling
What is the fire seal made from?
Titanium and a heat resistant silicon layer
What are the 2 components of the exhaust nozzle?
Centre body
Exhaust sleeve
Acoustic panels convert noise energy into what?
Heat energy
Where are light weight composite materials used?
Low temp area
What is the fwd engine mount connected to?
Engine fan frame
What is the aft engine mount connected to?
Turbine frame
What loads do attachment bolts carry?
Vertical loads
What loads do shear pins carry?
Thrust and side loads
What connects the support beam and fan frame together?
A spherical bearing
Anti vibration mounts reduce what?
Vibration and torque effects
What type of anti vibration mounts are used at the front?
Rubber mounts
What type of anti vibration mounts are used at the rear?
Swinging links
What type of electrical connectors are used on engines?
A bayonet type
How many threads are on a bayonet connector?
3
What are the 3 methods used to change engines?
Bootstrap method
Crane supported sling
Uplift loader method
What does the bootstrap method use?
A beam attached to the pylon with quick release pins
How much time do you save with the crane supported sling method?
30%
What is negative with the crane supported sling?
Equipment is expensive
Why is the uplift loader method not commonly used?
Because it requires expensive specialist equipment
How much time does the uplift loader method save?
40%
What should rigging pins be fitted with?
Red flags
What do drain lines collect?
Fluid and vapour
What are fluid leaks collected from?
Drive pad seals on the gearbox
Where can drain outlets be found?
On the pylon
Why must a leak rate check be carried out?
To decide if the leak is acceptable or not
How are holding tanks emptied?
By ram air
When does the holding tank empty?
When a/c reaches 200knts ram air will open the door that is spring loaded closed
How are collectors emptied?
Manually by spring loaded drain valves
