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Flashcards in Powerplant Deck (70):
1

What type of engines are in the 900? 700?

CF34-8C5
CF34-8C5B1

2

How many stages does the N2 axial flow compressor have?

10

3

How many lbs of thrust at full power?

13,560 lbs

4

How many lbs of thrust does the APR provide?

14,750 lbs

5

Where do the thrust reversers draw air from?

Bypass air

6

N1: ___ stage low pressure turbine drives the fan blades?

4

7

N2: ___ stage high pressure turbine drives the 10 stage axial flow compressor, combustor, accessory gear box?

2

8

N2 gearbox consists of?

(FISH OIL)
- Engine FUEL pump & fuel metering unit (FMU)
- IDG
- Air turbine STARTER (ATS)
- HYDRAULIC pump (EDP1, EDP2)
- Engine OIL lubrication pumps
- + FADEC
- + Integral oil reserve

9

What % of the thrust does the bypass air create?

80%

10

What actuates the VG (Variable Geometry) compressor linkage?

Fuel

11

FMU

Fuel Metering Unit

12

What runs the FMU?

FADEC

13

Are thrust levers mechanically or electrically actuated?

Electrically

14

What does the VG system regulate?

Airflow, by changing position of inlet guide & stator vanes

15

High Pressure Turbine drives what?

Compressor

16

Low Pressure Turbine drives what?

Fan

17

Fuel scheduling is controlled by?

FADEC

18

What are FADEC's 2 channels in the Dual Channel Computer?

- In control
- Standby

19

How often do the dual channel FADEC computers alternate roles?

Every second flight

20

FADEC alternator supplies power to both channels when N2 is > ___?

50%

21

What powers FADEC when N2 is < 50%?

Aircraft's electrical system

22

How many N2 idles does FADEC program?
What are they?

5
- Flight idle
- Approach idle
- Landing idle
- Reverse idle
- Ground idle

23

What are the 3 sub-systems FADEC controls the engines with?

- Fuel control
- Compressor airflow management
- Engine starting/ignition control

24

Left & Right engines' FADEC computers share info through what?

Cross-Talk Data Bus

25

N2 "Approach Idle" allows what?

Acceleration to TOGA thrust in min. time

26

How long does FADEC maintain Landing Idle?

5 seconds

27

MCT

Max Continuous Thrust

28

What does FADEC do if an engine failure occurs in the "Cruise" detent?

Increase operative N1

29

At what % difference will FADEC increase power on the operating engine?

N1 >= 15%

30

When does APR arm for takeoff?

When N1 is within 8% of scheduled takeoff power

31

When in the "Climb" detent on a single engine, how much thrust is provided?

MCT

32

Continuous Ignition must be used during:

- TO/LDG on contaminated runway
- Flight through moderate/heavy rain
- Flight through moderate/heavy turbulence
- Flight in vicinity of t-storms

33

When would you receive "L(R) AUTO IGNITION" advisory message?

FADEC detects a flameout

34

When would you receive"L(R) ENG FLAMEOUT" caution message?

N2 falls below relight envelope

35

What does FADEC automatically select at Stick Shaker?

CONT IGNITION

36

Bleed air manifold can be pressurized by:

- APU
- Crossbleed
- External air cart

37

ATS

Air Turbine Starter

38

What does the Start Valve require to open?

28V DC & pneumatic pressure

39

When does FADEC stop powering the Starter Motor?

50% N2

40

Start sequence: When "Start" switchlight is pressed:

- Isolation valve opens
- Start valve on associated engine opens
- White START switchlight illuminates
- L or R ENGINE START status message displayed
- 50% N2 rpm
-Starter disengages

41

Bleed air extracted from 6th & 10th stage provide pneumatic services for:

- Wing/Cowl anti-ice
- Air-conditioning/Pressurization
- Cross-bleed engine starts

42

ACSC

Air-Conditioning System Controllers

43

ACSC controls what?

Bleed-air selection (6th or 10th)

44

The 3 thrust lever detents:

- Climb
- TOGA
- Max Power

45

If uncommanded deployment of thrust reverser occurs, FADEC commands:

- Reverser to close
- Idle RPM on affected engine

46

Max usable oil?

7.2 quarts

47

Max allowable rate of oil consumption?

.05 GPH

48

Max duration without engine oil servicing?

36 hours (if not checked, level must be checked 3 minutes to 2 hours after each engine shutdown)

49

When does L(R) OIL LEVEL LO status message display?

- Engines operating: <80%

50

Oil Temp Limitations:
- Min for Starting
- Max Continuous
- Max Permissible (15 min. max)

-40 C
+155 C
+163 C

51

Max oil refill without motoring?

2 quarts

52

Before introducing fuel, ITT must be <:
- Ground
- Airborne

- 120 C
- 90 C

53

Define Cold-Soaked?

-30 C+ for > 8 hours

54

What must be done before a cold-soaked airplane can be started?

- Dry motor for 60 seconds
- Reversers deploy & stow w/in 2 seconds

55

Start Sequence:

N2 - 20%
ITT - <120 C
Right Thrust Lever.....ADVANCE TO IDLE
Engine Instruments....CHECK
Starter cutout (EICAS)
N1 - 20-25%
ITT - 450-600 C
N2 - 56.5-68.0%

56

N2 split at ground idle max %?

2%

57

Max ambient temperature for TO/LDG?

+35 ISA

58

Min ambient temperature for TO/LDG?

-40 C

59

Max altitude for windmill start?

21,000 ft

60

What allows 10th stage bleed air availability?

ACSC (Air Conditioning System Control)

61

What is the psi required for a cross-bleed start?

42 psi to a max of 80% N2

62

When will APR arm for takeoff?

Engine speed within 8% of scheduled takeoff power

63

How can you tell if APR is armed?

APR ARMED advisory message

64

When will APR activate

- thrust levers in TOGA or MAX POWER detent
- N1's differ by >=15%

65

How will we know APR has been activated?

Green APR icon on operable engine N1 gauge

66

What occurs during thrust reverser deployment?

translating cowls move aft
bypass air is redirected through cascade vanes

67

What indication will be seen with normal thrust reverser deployment?

Green REV icon on N1 gauge

68

What happens when a thrust reverser inadvertently deploys?

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

69

What are the indications of inadvertent thrust reverser deployment?

Amber REV icon on N1 gauge
REV UNLOCKED caution message

70

Where is the high-pressure air/ground connection located?

Under left engine nacelle