Engines day 1 Flashcards
OEi accumulated usage limit is how long?
10 minutes
What maintenance is a 1st Line Maintenance?
Scheduled and preventative, corrective/unscheduled (replacements of LRU)
What maintenance is a 3rd Line Maintenance?
Deep corrective maintenance which includes module repairs.
Who can do 3rd Line Maintenance?
Operator or Maintenance Facility holding specific license.
Where are the life limits for the engine found?
Ch.5 of the EMM
What are Life Limits expressed in?
Operating Cycles
What happens when a component reaches its Life Limit?
It must be scrapped.
Where is the maintenance information found?
Ch.71 of the EMM
What items are TBO?
Engine, Modules & Accessories
What items are Life Limits?
Cycles of Compressors and Turbines
Which phase of the engine has the highest temperture?
Combustion phase
How many Modules does the Arrial 2E have?
5
Centrifugal compression is made in which module?
Module 3
Which Line can a module be replaced?
2nd Line Maintenance
Which module has calibrated orifices to obtain a stable flame?
Module 3
What is the purpose of the calibrated orifices in the combustion chamber?
to obtain a stable flame, dilute and cool gases, and correce distribution of temperture on the gas turbine
Which components are the rotating compnemts of the centrifugal compresor?
The wheel and the bearings
What type is the combustion chamber ?
annular type combustion chamber
How is the combustion chamber split?
In to two
- Primary air for mixing with fuel
- Secondary for obtaining a stable flame and cooling
Where is the overall engine identification plate?
pitted on the L/H side of module M01 protection tube.
What are the compressor wheels made of?
Titanium
What is the speed of the Gas Generator (N1 shaft)?
52110 rpm
What is the speed of the engine output shaft (N2)?
6000 rpm
What is the temperture of the combustion chamber?
2500 C
What is the temperature at the Gas Turbine?
1125 C
Where are the engine mount vibration isolators installed?
at the fwd engine mount
What is monitoring the condition of the IBFs?
AMC1&2
What is the IBF filter frame made from?
Carbon Fibre.
How many Px sensors in the IBF?
2, one before and one after the filter
Where is the N1 speed measured?
on the alternator drive gear in the ENGINE ACC G.BOX
Module 5 is what?
reduction gearbox
How many stages of reduction is Module 5?
3 stage
