Powerplant

Question 0

What is the CRJ700 Powerplant Model Number?

Answer 0

Either
GE34-8C1
or
GE34-8C5B1

Question 1

What is the CRJ-900 Powerplant Model Number?

Answer 1

GE CF34-8C5

Question 2

What is the thrust rating without APR/with APR?

Answer 2

13,560 lbs/14,750 lbs

Question 3

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

Answer 3

ISA + 35 degree C

Question 4

What is the Min AAT for takeoff and landings?

Answer 4

-40 degree C

Question 5

What is the Max Altitude for a windmill start?

Answer 5

21,000 ft MSL

Question 6

Max engine to engine N2 split at ground idle power?

Answer 6

2%

Question 7

How much of the thrust is produced by core air?

Answer 7

Approximately 20%

Question 8

How much thrust is produced by by-pass air?

Answer 8

Approximately 80%

Question 9

How many stages of compression do we have?

Answer 9

The engine is equipped with a 10 stage axial flow compressor

Question 10

What accessories are driven off the N2 accessory gear box?

FISH OIL PLUS

Answer 10

The engine driven fuel pump
IDG
Air turbine starter
Engine driven hydraulic pump
Oil pump
FADEC Alternator

Question 11

What is the engine bleed air used for?

Answer 11

Engine start
Air conditioning
Pressurization
Wing and cowl anti-ice

Question 12

What stages of bleed air are used?

Answer 12

Normally 6th stage

10th stage used when demand exceeds capability of 6th stage

Question 13

What allows 10th stage bleed air availability?

Answer 13

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

Question 14

How many igniters are installed on each engine?

Answer 14

Two

IGN-A and IGN-B

Question 15

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

Answer 15

20% or greater N2

ITT <120 degree C

Question 16

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

Answer 16

42 psi to a maximum of 80% N2

Question 17

When will APR arm on takeoff?

Answer 17

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

Question 18

How can you determine if the APR system has armed?

Answer 18

APR ARMED advisory message

Question 19

When will the APR system activated?

Answer 19

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

Question 20

What occurs when the APR system activates?

Answer 20

FADEC commands an N1 speed increase dependent on thrust lever position

Question 21

What indication will we have of APR activation?

Answer 21

Green APR icon on operable engine N1 gauge

Question 22

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

Answer 22

Yes

Question 23

What is used to deploy and stow the thrust reversers?

Answer 23

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

Question 24

How are the thrust reversers deployed?

Answer 24

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

Question 25

What is occurring during thrust reverser deployment?

Answer 25

The translating cowls move aft | The bypass air is redirected through cascade vanes which redirect the air forwar

Question 26

What indications will be seen with normal thrust reverser deployment?

Answer 26

Green REV icon on N1 gauges

Question 27

What happens when a thrust reverser inadvertently deploys?

Answer 27

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

Question 28

What are the indications of an inadvertent thrust reverser deployment?

Answer 28

Amber REV icon on the N1 gauge | REV UNLOCKED caution message

Question 29

What is the normal air source for engine starts?

Answer 29

APU or cross-bleed if doing a single engine taxi

Question 30

What source is used if the APU is INOP?

Answer 30

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

Question 31

Where is the high pressure air ground connection located?

Answer 31

Under the left engine nacelle

Question 32

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

Answer 32

50% N2