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CRJ900 Mesa CL-65 Study - August 2019 Study Guide M > 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 thrust rating without APR/with APR

A

Without APR 13,360 lbs

With APR 14,510 lbs

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3
Q

What is the Max ambient air temperature for takeoff and landing

A

ISA + 40°C, limited to a maximum OAT 51°C

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4
Q

What is the Min ambient air temperature for takeoff and landing

A

-40°C

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5
Q

What is the Max Altitude for a windmill start

A

21,000 ft MSL

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6
Q

Max engine to engine N2 split at ground idle power

A

2%

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7
Q

How much of the thrust is produced by core air

A

Approximately 20%

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8
Q

How much thrust is produced by by-pass air

A

Approximately 80%

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9
Q

How many stages of compression do we have

A

10 stages, The engine is equipped with a 10 stage axial flow compressor.

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10
Q

What accessories are driven off the N2 accessory gear box? (fish oil plus)

A 
Engine driven Fuel pump,
IDG,
air turbine Starter,
engine driven Hydraulic pump,
Oil pump,
FADEC alternator
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11
Q

What is the engine bleed air used for

A

Engine start
air conditioning / pressurization
wing and cowl anti-ice

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12
Q

What stages of bleed air are used

A

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

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13
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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14
Q

How many igniters are installed on each engine

A

Two, IGN-A and IGN- B

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15
Q

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

A

N2 20% or greater

ITT <120°C

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16
Q

What occurs when the APR system activates

A

FADEC commands an N1 speed increase dependent on thrust lever position

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17
Q

What indication will we have of APR activation

A

Green APR icon on operable engine N1 gauge

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18
Q

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

A

Yes

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19
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

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20
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.

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21
Q

What is occurring during thrust reverser deployment

A

The translating cowls move aft, blocking the rearward flow of bypass air.
The fan discharge airflow is redirected forward though the cascase vanes.

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22
Q

What indications will be during thrust reverser deployment

A

Amber REV icon on the N1 gauges during cowl transition.

Green REV icon on N1 gauges when the reversers are fully deployed.

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23
Q

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

A

60 kts

24
Q

What happens when a thrust reverser inadvertently deploys

A

FADEC commands thrust to be set to idle on affected engine

25
Q

What are the indications of an inadvertent thrust reverser deployment?

A

Amber REV icon on N1 gauge,
REV UNLOCKED caution message
FADEC commands idle thrust on affected engine.
NOTE: Thrust levers will NOT move when FADEC command idle thust

26
Q

What is the normal air source for engine starts

A

APU or cross-bleed if doing a single engine taxi

27
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 then used to start the other engine after clearing it with ground control.

28
Q

When will the starter cut-out during an engine start

A

50% N2 RPM

29
Q

Max continuous thrust (MCT) for the CF34-8C5

A

13,680

30
Q

What is the engine bleed air used for?

A

Engine start
Air conditioning / pressurization
Wing and cowl anti-ice

31
Q

What is the normal source used for engine starting?

A

APU bleed air

32
Q

What is the minimum bleed air pressure required for a cross bleed start?

A

42 PSI at a mixmum of 80% N2 for the operating engine

33
Q

Where is the high pressure, ground air supply connection located?

A

On the fuselage, aft of the cargo bay door.

34
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

35
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

36
Q

What would cause the FADEC to automatically abort the start?

A

Hot start or Hung start

37
Q

What supplies power to the ignitors

A

IGN-A AC ESS Bus

IGN-B Static inverter on the battery bus

38
Q

When must continuous ignition be used?

A

Takeoffs and landings on contaminated runways.
Flight though moderate or heavier intensity rain.
Flight though moderate or heavier intensity turbulence.
Flight in the vicinity of thunderstorms.

39
Q

When is continuous ignition automatically activated?

A

When approaching a high angle of attack

40
Q

What conditions would cause takeoff configuration warning?

A 
Parking brake SET
Autopilot ON
Spoilers Extended (flight or ground spoilers)
Stab trim out of green range
Flaps not set 8° or 20°
Aileron trim out of green range
Rudder trim out of green range
41
Q

What is APR?

A

Automatic Performance Reserve thrust

42
Q

When is APR armed for takeoff?

A

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

43
Q

When is APR armed for landing?

A

When flaps are greater than 20°, and the landing gear is down.

44
Q

When will the APR system be activated?

A

Thrust levers in TOGA, and N1s differ by 15% or greater after APT has been armed.
When the trust levers are set in the MAX POWER detent.
When the HIGH PWR SCHEDULE switch light is selected ON

45
Q

What occurs when the APR system activated?

A

FADEC commands a thrust increase dependent on thrust lever position.

46
Q

What indication is displayed when APR is activated?

A

Green APR icon on the n1 gauge

47
Q

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

A

Yes

48
Q

Minimum Oil temerature for start

A

-40°C

49
Q

Max contininous oil temerature

A

155°C

50
Q

Max permissible oil temperature

A

163°C (15 minutes max)

51
Q

Max oil consumption

A

0.05 gallons/hr

52
Q

Where can the oil quantity be checked?

A

On the EICAS MENU? page

53
Q

When should the Oil capacity be checked?

A

3 minutes to 2 hours after shutdown

54
Q

When should the engine oil level be replenished?

A

15 minutes to 2 hours after shutdown

55
Q

Max oil refill before dry motoring is required

A

2 quarts

56
Q

How is the oil cooled?

A

Fuel/oil heat exchanger

57
Q

WHat is the total quantity of the engine oil tanks?

A

7.2 quarts

CRJ900 Mesa CL-65 Study - August 2019 Study Guide M (34 decks)

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