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CL-65 Study Guide > Powerplant > Flashcards

Powerplant Flashcards

1
Q

What is the CRJ-900 Powerplant Model Number?

A

General Electric CF34-8C5

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2
Q

What is the CRJ-700 Powerplant Model Number?

A

Either:
General Electric CF34-8C1
or General Electric CF34-8C5B1

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3
Q

What is the thrust rating without APR/with APR?

A

13,560 lbs/ 14,750 lbs

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4
Q

What is the Max ambient air temperature for takeoff and landing?

A

ISA + 35ºC

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5
Q

What is the Min ambient air temperature for takeoff and landing?

A

-40º C

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6
Q

What is the Max Altitude for a windmill start?

A

21,000 ft MSL

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7
Q

Max engine to engine N2 split at ground idle power?

A

2%

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8
Q

How much of the thrust is produced by by-pass air?

A

Approximately 80%

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9
Q

How much of the thrust is produced by core air?

A

Approximately 20%

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10
Q

How many stages of compression do we have?

A

The engine is equipped with a 10 stage axial flow compressor

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11
Q

What accessories are driven off the N2 accessory gear box?

A 
engine driven Fuel pump
IDG (Integrated Drive Generator)
Air Turbine Starter (ATS)
engine driven Hydraulic pump
OIL pump
\+ FADEC alternator
\+ Integral Oil Reservoir
(FISH OIL +)
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12
Q

What is the engine bleed air used for?

A

Engine start
air conditioning
pressurization
wing and cowl anti-ice

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13
Q

What stages of bleed air are used?

A

Normally 6th stage, 10th stage is used when demand exceeds capability of the 6th stage

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14
Q

What allows 10th stage bleed air availability?

A

Air Conditioning System Controller (ACSC) automatically opens the High Pressure Valve (HPV)

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15
Q

How many igniters are installed on each engine?

A

Two, IGN-A and IGN-B

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16
Q

What are the required parameters before fuel is introduced during a ground engine start?

A

20% N2 or greater

ITT less than 120º C

17
Q

What is the air pressure requirement provided by the operating engine to initiate a cross-bleed start?

A

42 psi to a maximum of 80% N2

18
Q

When will the APR system activate?

A

Thrust levers in TOGA
normal or flex thrust scheduled
N1’s differ by 15% or greater
Thrust levers set in the Max Power detent

19
Q

When will APR arm on takeoff?

A

Engine Speed with 8% of scheduled takeoff power, normal or flex

20
Q

What occurs when the APR system activates?

A

FADEC commands an N1 speed increase dependent on thrust lever position

21
Q

What indications will we have of APR activation?

A

Green APR icon on operable engine N1 gauge

22
Q

If an engine fails during a go-around, will the APR system activate?

A

Yes

23
Q

What is used to deploy and stow the thrust reversers?

A

Hydraulics
L reverser uses hydraulic system # 1
R reverser uses hydraulic system # 2

24
Q

How are the thrust reversers deployed?

A

Thrust levers must be at idle. The reverse thrust levers are raised by engaging the thrust reverse release triggers. A solenoid lock stops reverse thrust lever movement while the reversers deploy. Once deployed, the lock releases and N1 may be increased by raising the reverse thrust levers.

25
Q

What is occurring during thrust reverser deployment?

A

The translating cowls move aft. The bypass air is redirected through cascade vanes which redirect the air forward.

26
Q

What indications will be seen with normal thrust reverser deployment?

A

Green REV icon on N1 gauges

27
Q

When do the thrust reversers need to be either stowed or at idle?

A

CRJ-900/900EP: 60 kts

CRJ-700: 75 kts

28
Q

What happens when a thrust reverser inadvertently deploys?

A

FADEC commands reverser to close and thrust set to idle on affected engine.

29
Q

What are the indications of an inadvertent thrust reverser deployment?

A

Amber REV icon on N1 gauge

REV UNLOCKED caution message

30
Q

What is the normal air source for engine starts?

A

APU or cross-bleed if doing a single engine taxi

31
Q

What source is used if the APU is INOP?

A

Ground air cart or bottle attached to the high pressure air ground connection to start one engine. A cross bleed start is used to start the other engine after clearing it with ground control.

32
Q

Where is the high pressure air ground connection located?

A

Under left engine nacelle

33
Q

When will the starter cut-out during an engine start?

A

50% N2

CL-65 Study Guide (25 decks)

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