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CL-65 Study Guide > Powerplant > Flashcards

Powerplant Flashcards

1
Q

CRJ powerplant model

A

General Electric CF-34-8C5

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2
Q

Normal takeoff thrust for CF-34-8C5

A

13,360 lbs thrust

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3
Q

Automatic Performance Reserve (APR) thrust rating for the CF-34-8C5

A

14,510 lbs thrust

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4
Q

Max Continuous Thrust (MCT) for the CF-34-8C5

A

13,680 lbs thrust

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5
Q

Max temperature for takeoff and landing

A

ISA +40 degrees C

OAT of +51 degrees C

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6
Q

Min ambient air temperature for takeoff

A

-40 degrees C

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7
Q

Max altitude for windmill engine start

A

21,000 MSL

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8
Q

Max engine to engine N2 split at ground idle power

A

2%

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9
Q

How much thrust is produced by the core air

A

Approximately 20%

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10
Q

How much thrust is produced by the bypass air

A

Approximately 80%

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11
Q

How many compressor stages are there in the CF-34-8C5

A

10 stages

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12
Q

What accesories are driven off of the N2 accessory gear box

A

Engine driven fuel pump

IDG

Air Turbine Starter (ATS)

Oil pump

FADEC alternator

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13
Q

What stages supply bleed air to the common bleed air manifold

A

Normally the 6th stage, the 10th stage is also available when the demand exceeds the capabilities of the air in 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

What is the engine bleed air used for

A

Engine starts

Pressurization and air conditioning

Wing and cowl anti ice

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16
Q

What is the min bleed air pressure required for a cross bleed start

A

42 PSI at a max of 80% N2 for operating engine

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17
Q

What is the normal air source for the starting engine

A

APU bleed air

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18
Q

What source is used to start an engine when the APU is INOP or shut down

A

Ground air cart

Cross bleed starts from and operating engine may also be used

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19
Q

Where is the high pressure, ground air supply connection located

A

On the fuselage aft of the cargo bay door

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20
Q

What are the engine starter cranking limits

A

Attempt 1-2, 90 seconds ON / 10 seconds OFF

Attempt 3-5, 90 seconds ON / 5 minutes OFF

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21
Q

What are the dry motoring limits

A

Attempt 1, 90 seconds ON / 5 minutes OFF

Attempt 2-5, 30 seconds ON / 5 minutes OFF

22
Q

What causes the FADEC to automatically abort a start

A

Hot start

Hung start

23
Q

How many ignitors are installed in each engine

A

2

24
Q

What supplies power to the ignitors

A

IGN-A: AC ESS BUS

IGN-B: Static invertor on the battery bus

25
Q

When must continuous ignition be used

A

Takeoffs and landings on contaminated runways

Flight through moderate or heavy rain

Flight through moderate or heavy turbulence

Flight in the vicinity of thunderstorms

26
Q

When is continuous ignition automatically activated

A

When approaching a high angle of attack

27
Q

What conditions are required before advancing thrust levers to IDLE during an engine start

A

N2 greater than 20%

ITT below 120 degrees C

28
Q

What conditions would cause a takeoff configuration warning

A

Parking break set

Autopilot ON

Spoilers extended

Flaps not 8 or 20 degrees

Aileron trim out of green range

Rudder trim out of green range

29
Q

What is APR

A

Automatic Performance Reserve

30
Q

When is APR armed for takeoff

A

When the N1 RPM of both engines is within 8% of scheduled takeoff power

31
Q

When is APR armed for landing

A

Flaps 20 degrees or greater

Landing gear is down

32
Q

When will the APR system be activated

A

Thrust levers in TOGA

N1 differs by 15% or greater on one engine after APR is armed

Thrust levers set to MAX POWER

HIGH PWR SCHEDULE switchlight is selected ON

33
Q

What occurs when APR system activates

A

FADEC commands a thrust increase dependant on the thrust lever position

34
Q

What indication is displayed when APR is activated

A

Green APR icon on N1 gauge

35
Q

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

A

Yes

36
Q

What is used to deploy the thrust reversers

A

L reverser uses hydraulic system 1

R reverser uses hydraulic system 2

37
Q

What indications will be displayed during thrust reverser deployment

A

Amber REV icon on the N1 gauges during cowl transition

Green REV icon on the N1 gauges when they are fully deployed

38
Q

What is occuring during thrust reverser deployment

A

The translating cowls move aft, blocking the rearward flow of bypass air

The fan discharge airflow is redirected forward through the cascade vanes

39
Q

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

A

60 knots

40
Q

What are indications of an inadvertent thrust reverser deployment

A

Amber REV icon on the N1 gauge

REV UNLOCKED caution message

FADEC commands idle thrust of affected engine

Note: Thrust levers will not move when when FADEC commands idle thrust

41
Q

Minimum oil temperature for start

A

-40 degrees C

42
Q

Maximum continuous oil temperature

A

155 degrees C

43
Q

Maximum permissible oil temperature

A

163 degrees C

15 minutes max

44
Q

Maximum oil consumption

A

0.05 gallons per hour

45
Q

Where can the oil quality be checked

A

EICAS menu page

46
Q

When should oil capacity be checked

A

3 minutes - 2 hours after shutdown

47
Q

When should the oil level be replenished

A

15 minutes- 2 hours after shutdown

48
Q

How is oil cooled

A

Fuel/oil heat exchanger

49
Q

Maximum oil refill before dry motoring is required

A

2 quarts

50
Q

What is the total oil quantity of the engine oil tanks

A

7.2 quarts

CL-65 Study Guide (11 decks)

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