15.19 Flashcards
What loads does the engine attachment bolts carry and how many attachment bolts are there
Vertical & 4 bolts
In the fwd engine mount what’s the thrust and side loads transferred to
Shear pins
How’s the support beam for engine fwd mount connected to the frame
By centre centre normally a spherical bearing
By two thrust links via a cross beam
What axis’s do fwd mount constructions transfer forces in
Y and z
Weight ans side loads
What are the aft engine mounts connected to
Engine turbine frame by links at 3 points
What axis can aft engine mounts ONLY transfer loads in
Vertical
What is used to secure the engine to the upper nacelle and what benefit does it have
Resilient rubber mounts
Reduce vibration and torque effects
What type of links are used to support the engine at the rear
Swinging links
What defects on anti vibration mounts are looked for and what ones doesn’t require a replacement
Cracking, pitting, corrosion ( doesn’t have to unless exceeds AMM regulations) dimensions
What type of connectors are used on modern engines and how can it be identified?
What’s a benefit of these connectors
Bayonet
Three separate threads
They allow for a quick disconnect
What’s the standard method for all wing mounted engines
Bootstrap method
What makes the bootstrap method for removing engines more Tim consuming
Pylon fairing must be removed before hand
What’s a disadvantage and an advantage of the crane supported sling method for removing engines
Expensive
30% less time consuming
What’s the shape of the arm used in crane supported slings for removal of engines
g shaped
How are control levers ans nobs easily identified
Different shape and coloured
What’s the purpose of a friction damper in a throttle lever assembly
Prevent any movement of the lever during vibration
What’s control rigging
The final adjustment of control system to provide correct input to the engines.
What should rigging pins have attached to them for safety
Red flags
What should be done after control rigging
Carry out a engine ground run for power check and synchronisation
What are the main components of the drain system
Drain lines and module assembly where all drain lines end
What’s the lower part of the module assembly in drain system
Drain mast
What fluid leaks collected from on gearbox
All drive pad seals