Engine Flashcards

0
Q

Engine oil pressure operating range

A

25-95 psi

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1
Q

Eng FADEC

A

Ess power below 50% n2
PMA power above 50% n2

1 FADEC per engine
2channels per FADEC

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2
Q

When is flex prohibited?

A

Contaminated runway

Low level windshear

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3
Q

What is flex?

A

Reduced thrust take off based on assumed temp.

Telling the FADEC that is warmer than it actually is

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4
Q

Engine stable condition

A
N1.                 25%.        2-4-6-5&1/2
ITT.                 450
N2.                 60%
Fuel flow.       500 lbs an hr
Oil press.       > 25 psi
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5
Q

Engine start sequence

A
Select start
N2 rotation
7% N2 - ignition
20% N2 - fuel flow( below 120 ITT )
50% N2 - ignition off and starter cutout
                 Oil pressure in the green
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6
Q

Describe the engine

A
GE CF34-8E5
High bypass dual rotor turbofan 
10 stage variable geometry compressor
    2 stage high pressure turbine 
1 stage Fan
   4 stage low pressure turbine 
 Max thrust 14,200
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7
Q

Max ITT for engine start

A

815 ITT

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