Powerplant

Question 1

CRJ powerplant model

Answer 1

General Electric CF-34-8C5

Question 2

Normal takeoff thrust for CF-34-8C5

Answer 2

13,360 lbs thrust

Question 3

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

Answer 3

14,510 lbs thrust

Question 4

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

Answer 4

13,680 lbs thrust

Question 5

Max temperature for takeoff and landing

Answer 5

ISA +40 degrees C

OAT of +51 degrees C

Question 6

Min ambient air temperature for takeoff

Answer 6

-40 degrees C

Question 7

Max altitude for windmill engine start

Answer 7

21,000 MSL

Question 8

Max engine to engine N2 split at ground idle power

Answer 8

2%

Question 9

How much thrust is produced by the core air

Answer 9

Approximately 20%

Question 10

How much thrust is produced by the bypass air

Answer 10

Approximately 80%

Question 11

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

Answer 11

10 stages

Question 12

What accesories are driven off of the N2 accessory gear box

Answer 12

Engine driven fuel pump

IDG

Air Turbine Starter (ATS)

Oil pump

FADEC alternator

Question 13

What stages supply bleed air to the common bleed air manifold

Answer 13

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

Question 14

What allows 10th stage bleed air availability

Answer 14

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

Question 15

What is the engine bleed air used for

Answer 15

Engine starts

Pressurization and air conditioning

Wing and cowl anti ice

Question 16

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

Answer 16

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

Question 17

What is the normal air source for the starting engine

Answer 17

APU bleed air

Question 18

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

Answer 18

Ground air cart

Cross bleed starts from and operating engine may also be used

Question 19

Where is the high pressure, ground air supply connection located

Answer 19

On the fuselage aft of the cargo bay door

Question 20

What are the engine starter cranking limits

Answer 20

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

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

Question 21

What are the dry motoring limits

Answer 21

Attempt 1, 90 seconds ON / 5 minutes OFF

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

Question 22

What causes the FADEC to automatically abort a start

Answer 22

Hot start

Hung start

Question 23

How many ignitors are installed in each engine

Answer 23

2

Question 24

What supplies power to the ignitors

Answer 24

IGN-A: AC ESS BUS

IGN-B: Static invertor on the battery bus

Question 25

When must continuous ignition be used

Answer 25

Takeoffs and landings on contaminated runways Flight through moderate or heavy rain Flight through moderate or heavy turbulence Flight in the vicinity of thunderstorms

Question 26

When is continuous ignition automatically activated

Answer 26

When approaching a high angle of attack

Question 27

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

Answer 27

N2 greater than 20% ITT below 120 degrees C

Question 28

What conditions would cause a takeoff configuration warning

Answer 28

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

Question 29

What is APR

Answer 29

Automatic Performance Reserve

Question 30

When is APR armed for takeoff

Answer 30

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

Question 31

When is APR armed for landing

Answer 31

Flaps 20 degrees or greater Landing gear is down

Question 32

When will the APR system be activated

Answer 32

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

Question 33

What occurs when APR system activates

Answer 33

FADEC commands a thrust increase dependant on the thrust lever position

Question 34

What indication is displayed when APR is activated

Answer 34

Green APR icon on N1 gauge

Question 35

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

Answer 35

Yes

Question 36

What is used to deploy the thrust reversers

Answer 36

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

Question 37

What indications will be displayed during thrust reverser deployment

Answer 37

Amber REV icon on the N1 gauges during cowl transition Green REV icon on the N1 gauges when they are fully deployed

Question 38

What is occuring during thrust reverser deployment

Answer 38

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

Question 39

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

Answer 39

60 knots

Question 40

What are indications of an inadvertent thrust reverser deployment

Answer 40

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

Question 41

Minimum oil temperature for start

Answer 41

-40 degrees C

Question 42

Maximum continuous oil temperature

Answer 42

155 degrees C

Question 43

Maximum permissible oil temperature

Answer 43

163 degrees C | 15 minutes max

Question 44

Maximum oil consumption

Answer 44

0.05 gallons per hour

Question 45

Where can the oil quality be checked

Answer 45

EICAS menu page

Question 46

When should oil capacity be checked

Answer 46

3 minutes - 2 hours after shutdown

Question 47

When should the oil level be replenished

Answer 47

15 minutes- 2 hours after shutdown

Question 48

How is oil cooled

Answer 48

Fuel/oil heat exchanger

Question 49

Maximum oil refill before dry motoring is required

Answer 49

2 quarts

Question 50

What is the total oil quantity of the engine oil tanks

Answer 50

7.2 quarts