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Flashcards in Powerplant Deck (34):
2

What is the CRJ-900 Powerplant model number?

General Electric CF34-8C5

3

What is the thrust rating without APR / with APR?

13560 lbs / 14,750 lbs

4

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

ISA + 35c

5

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

-40c

6

What is the Max Altitude for a windmill start?

21,000 ft MSL

7

N2 for start?

>= 20%

8

Max engine to engine N2 split at ground idle power?

2%

9

How much of the thrust is produced by core air?

Approx. 20%

10

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

Approx. 80%

11

How many stages of compression do we have?

Engine has a 10 stage axial flow compressor

12

What accessories are driven off the N2 accessory gear box?

Engine driven fuel pump, IDG, Air turbine Starter, engine driven hydraulic pump, oil pump, FADEC alternator

13

What is the engine bleed air used for?

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

14

What stages of bleed air are used?

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

15

What allows 10th stage bleed air availability?

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

16

How many igniters are installed on each engine?

Two, IGN-A, IGN-B

17

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

20% or greater N2, ITT < 120c

18

When will APR arm on takeoff?

Engine speed within 8% of scheduled takeoff power, normal or flex

19

How can you determine if the APR system has armed?

APR ARMED advisory message

20

When will the APR system activate?

Thrust levers in TOGA, normal or flex thrust scheduled, N1's differ by 15% or greater or when thrust levers set in the MAX POWER detent

21

What occurs when the APR system activates?

FADEC commands an N1 speed increase dependent on thrust lever position

22

What indication will we have of APR activation?

Green APR icon on operable engine N1 gauge

23

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

Yes

24

What system is used to deploy and stow the thrust reversers?

Hydraulics

25

How are thrust reversers deployed?

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 solenoid lock releases allowing N1 to increase with the thrust reverse levers

26

What is occurring during thrust reverser deployment?

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

27

What indications will be seen with normal thrust reverser deployment?

Green REV icon on N1 gauges

28

What happens when a thrust reverser inadvertently deploys?

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

29

What are the indications of an inadvertent thrust reverser deployment?

Amber REV icon on N1 gauge. REV UNLOCKED caution message

30

What is the normal air source for engine starts?

APU or cross bleed if doing a single engine taxi

31

What source is used if the APU is INOP?

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

32

Where is the high pressure air ground connection located?

Under left engine nacelle

33

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

50% N2

34

IGN B is powered from:

Battery Bus utilizing a static inverter

35

Cross bleed air starts require that:

Operating engine to achieve 42 psi