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Flashcards in Powerplant Deck (41):
1

How man stages have compressor variable geometry (CVG) vanes

First 4 Stages

2

If engine oil levels have NOT been serviced within the preceding 36 hrs what restrictions applies?

Engine oil levels must be checked following each shutdown after 3 minutes but before 2 hours following engine shutdown.

3

APR thrust is limited to how long?

10 min single engine

4

What is the CRJ-900 power plant model number and 700

General Electric CF34-8C5
Either GE CF34-8C1 or CF34-8C5B1

5

What is the trust rating normal and with APR

13,560 and with APR 14,750

6

What is the max ambient air temperature for takeoff and landing

ISA + 35 c

7

What is the min ambient air temperature for takeoff and landing

-40c

8

What is the max altitude for windmill start

21,000 ft MSL

9

Max engine to engine N2 split at ground idle power

2%

10

How much of the trust is produced by core air

Approximately 20%

11

How much thrust is produced by by-pass air

Approximately 80%

12

How many stages of compression do we have

10 stage axial flow compressor

13

What accessories are driven off the N2 accessory gear box

Engine driven fuel pump
IDG (integrated driven generator)
Air turbine starter
Engine driven hydraulic pump
Oil pump
FADEC alternator

14

What is engine bleed air used for

Engine start
Air conditioning
Pressurization
Wing and cowl anti-ice

15

What stages of bleed air are used

Normal 6th stage and 10th stage used when demand exceeds 6th stage

16

What allows 10th stage bleed air availability

Air conditioning system controller (ACSC) automatically opens the high pressure valve (HPV)

17

How many igniters are installed on each engine

Two, IGN-A and IGN-B

18

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

20% or grater N2 ITT less than 120c

19

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

42 PSI to a maximum of 80% N2

20

When will APR arm on takeoff

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

21

When will the APR system activate

Thrust levers in TOGA, Normal or flex thrust scheduled, and if N1s differ by 15% or greater or when thrust levers are set in the MAX POWER detent

22

What occurs when the APR system activates

FADEC commands an N1 speed increase dependent on thrust lever position

23

What indication will we have of APR activation

Green APR icon on operable engine N1 gauge

24

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

Yes

25

What is used to deploy and stow the thrust reversers

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

26

What indication will be seen with normal thrust reverser deployment

Green REV icon on N1 gauge

27

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

CRJ-900 60 kts
CRJ-700 75 kts

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

Where is the high pressure air ground air connection located

Under left engine nacelle

31

When will the starter cut out during an engine start

50% N2

32

N1 max continuous, normal T/O, APR or Go around

99.5%

33

ITT temps Normal T/O

963 for the first 2 min,
947 for the next 3 min

34

ITT APR Thrust Go-Around

1006 for the first 2 min
990 for the next 3 min

35

Oil pressure T/O power / Max continues

45-95 PSI

36

How many channels does FADEC have

2 Channels

37

How long does FADEC hold higher idle on landing for reverse thrust

5 seconds if thrust reverser not used within the 5 seconds ground idle is set.

38

What is N2 ground idle

55%-65% N2

39

Will FADEC increase The N1 on the good engine if you have an engine failure?

Yes, the two FADEC systems talk

40

When is takeoff N1 thrust locked in

At 65 KIAS

41

When does FADEC change the N1 setting after takeoff?

When the aircraft passes through 400 ft and the throttles are moved out of the TOGA detent