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CL-65 Study Guide > Powerplant > Flashcards

Powerplant Flashcards

1
Q

What type of engines are in the 900? 700?

A

CF34-8C5

CF34-8C5B1

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2
Q

How many stages does the N2 axial flow compressor have?

A

10

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3
Q

How many lbs of thrust at full power?

A

13,560 lbs

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4
Q

How many lbs of thrust does the APR provide?

A

14,750 lbs

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5
Q

Where do the thrust reversers draw air from?

A

Bypass air

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6
Q

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

A

4

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7
Q

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

A

2

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8
Q

N2 gearbox consists of?

A

(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
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9
Q

What % of the thrust does the bypass air create?

A

80%

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10
Q

What actuates the VG (Variable Geometry) compressor linkage?

A

Fuel

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11
Q

FMU

A

Fuel Metering Unit

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12
Q

What runs the FMU?

A

FADEC

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13
Q

Are thrust levers mechanically or electrically actuated?

A

Electrically

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14
Q

What does the VG system regulate?

A

Airflow, by changing position of inlet guide & stator vanes

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15
Q

High Pressure Turbine drives what?

A

Compressor

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16
Q

Low Pressure Turbine drives what?

A

Fan

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17
Q

Fuel scheduling is controlled by?

A

FADEC

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18
Q

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

A
  • In control

- Standby

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19
Q

How often do the dual channel FADEC computers alternate roles?

A

Every second flight

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20
Q

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

A

50%

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21
Q

What powers FADEC when N2 is < 50%?

A

Aircraft’s electrical system

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22
Q

How many N2 idles does FADEC program?

What are they?

A

5

  • Flight idle
  • Approach idle
  • Landing idle
  • Reverse idle
  • Ground idle
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23
Q

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

A
  • Fuel control
  • Compressor airflow management
  • Engine starting/ignition control
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24
Q

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

A

Cross-Talk Data Bus

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25
Q

N2 “Approach Idle” allows what?

A

Acceleration to TOGA thrust in min. time

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26
Q

How long does FADEC maintain Landing Idle?

A

5 seconds

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27
Q

MCT

A

Max Continuous Thrust

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28
Q

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

A

Increase operative N1

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29
Q

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

A

N1 >= 15%

30
Q

When does APR arm for takeoff?

A

When N1 is within 8% of scheduled takeoff power

31
Q

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

A

MCT

32
Q

Continuous Ignition must be used during:

A
  • TO/LDG on contaminated runway
  • Flight through moderate/heavy rain
  • Flight through moderate/heavy turbulence
  • Flight in vicinity of t-storms
33
Q

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

A

FADEC detects a flameout

34
Q

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

A

N2 falls below relight envelope

35
Q

What does FADEC automatically select at Stick Shaker?

A

CONT IGNITION

36
Q

Bleed air manifold can be pressurized by:

A
  • APU
  • Crossbleed
  • External air cart
37
Q

ATS

A

Air Turbine Starter

38
Q

What does the Start Valve require to open?

A

28V DC & pneumatic pressure

39
Q

When does FADEC stop powering the Starter Motor?

A

50% N2

40
Q

Start sequence: When “Start” switchlight is pressed:

A
  • 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
Q

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

A
  • Wing/Cowl anti-ice
  • Air-conditioning/Pressurization
  • Cross-bleed engine starts
42
Q

ACSC

A

Air-Conditioning System Controllers

43
Q

ACSC controls what?

A

Bleed-air selection (6th or 10th)

44
Q

The 3 thrust lever detents:

A
  • Climb
  • TOGA
  • Max Power
45
Q

If uncommanded deployment of thrust reverser occurs, FADEC commands:

A
  • Reverser to close

- Idle RPM on affected engine

46
Q

Max usable oil?

A

7.2 quarts

47
Q

Max allowable rate of oil consumption?

A

.05 GPH

48
Q

Max duration without engine oil servicing?

A

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

49
Q

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

A
  • Engines operating: <80%
50
Q

Oil Temp Limitations:

  • Min for Starting
  • Max Continuous
  • Max Permissible (15 min. max)
A

-40 C
+155 C
+163 C

51
Q

Max oil refill without motoring?

A

2 quarts

52
Q

Before introducing fuel, ITT must be <:

  • Ground
  • Airborne
A
  • 120 C

- 90 C

53
Q

Define Cold-Soaked?

A

-30 C+ for > 8 hours

54
Q

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

A
  • Dry motor for 60 seconds

- Reversers deploy & stow w/in 2 seconds

55
Q

Start Sequence:

A 
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
Q

N2 split at ground idle max %?

A

2%

57
Q

Max ambient temperature for TO/LDG?

A

+35 ISA

58
Q

Min ambient temperature for TO/LDG?

A

-40 C

59
Q

Max altitude for windmill start?

A

21,000 ft

60
Q

What allows 10th stage bleed air availability?

A

ACSC (Air Conditioning System Control)

61
Q

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

A

42 psi to a max of 80% N2

62
Q

When will APR arm for takeoff?

A

Engine speed within 8% of scheduled takeoff power

63
Q

How can you tell if APR is armed?

A

APR ARMED advisory message

64
Q

When will APR activate

A
  • thrust levers in TOGA or MAX POWER detent

- N1’s differ by >=15%

65
Q

How will we know APR has been activated?

A

Green APR icon on operable engine N1 gauge

66
Q

What occurs during thrust reverser deployment?

A

translating cowls move aft

bypass air is redirected through cascade vanes

67
Q

What indication will be seen with normal thrust reverser deployment?

A

Green REV icon on N1 gauge

68
Q

What happens when a thrust reverser inadvertently deploys?

A

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

69
Q

What are the indications of inadvertent thrust reverser deployment?

A

Amber REV icon on N1 gauge

REV UNLOCKED caution message

70
Q

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

A

Under left engine nacelle

CL-65 Study Guide (18 decks)

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