Study Guide Engine Flashcards

1
Q

What types of engines are on the aircraft?

A

-TWo GE CF-34-8E5 Hi-Bypass, 2 spool, axial flow, turbo fan

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2
Q

How much thrust do the engines produce?

A

13,800-14,200

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3
Q

Describe N1 spool

A

Single stage fan, 4 stage LP turbine

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4
Q

Describe N2 spool

A

10 stage compressor, 2 stage HP turbine

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5
Q

How many ignators per engine?

A

2 per

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6
Q

How many ignitors activate for engine start?

A

Ground

  • 1 igniter (switch in AUTO)
  • 2 igniters (switch in AUTO)
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7
Q

What happens when the ignition switch is selected to OVRD?

A

Activates both igniters on the ground and in flight

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8
Q

Can the igniters be turned off during flight?

A
  • The switch may be moved to the OFF position but the FADEC disregards the command
  • The off position is used for dry motoring on the ground only
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9
Q

What controls the engine?

A
  • A two channel FADEC

- One channel is active while the other is standby. They alternate with each start

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10
Q

What does the Cyan line on the N1 gauge represent on approach and when does it appear?

A
  • Minimum N1 for bleed requirements in icing conditions

- Configured for landing <1200 RA (when anti ice is on)

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11
Q

What sources are available for engine starting?

A
  • APU
  • Ground source (Air)
  • Opposite engine
  • Windmilling
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12
Q

Does the FADEC provide engine start protection?

A

Only on the ground for a hot, hung start, or no light off

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13
Q

What will the FADEC automatically do in case of a Hot start?

A
  • FADEC will not allow FF if ITT >120 C

- FADEC will automatically dry motor engine

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14
Q

Describe the engine start sequence

A

Start switch to start

  • 7% N2 ignition
  • 20% N2 Fuel flow
  • 20% N2 +5 seconds Light off
  • 50% N2 ignition off

Engine stabilizes:

  • N1 27%
  • ITT 460 C
  • N2 62%
  • FF 550 lbs/hr
  • Oil pressure >25psi
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15
Q

What does WML mean on the engine indications?

A
  • Windmilling engine
  • The FADEC has detected a flame-out and is attempting an auto re-light, or
  • An assisted start has been commanded
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16
Q

What provides underspeed and overspeed protection?

A
  • The FADEC via the FMU

- Approximately 52% N2, and 102% N2 respectively

17
Q

What happens after 3 overspeed detection events?

A

FADEC will not re-light the engine

18
Q

What heats the fuel and cools the engine oil?

A

Fuel/Oil heat exchange

19
Q

What is ATTCS? What controls it?

A
  • Automatic Take-off Thrust Control System
  • Provides max thrust reserve (RSV) according to current rate previously selected via the MCDU
  • FADEC controlled
20
Q

What will trigger and ATTCS event?

A
  • N1 difference >15% between engines
  • Engine failure during TOGA
  • Wind shear detected
21
Q

When is thrust reverse available?

A

Weight on wheels (ground use only)

22
Q

What happens if a thrust reverser inadvertently deploys?

A

FADEC limits respective engine thrust to IDLE.

23
Q

What engine ratings may only be used for 5 minutes?

A
  • TO-1
  • TO-RSV (TL beyond TOGA)
  • GA (two-engine go around)
  • GA-RSV (One engine go-around or windshear)
24
Q

What is FLEX?

A

Reduced takeoff thrust based on assumed temperature

25
Q

Can FLEX thrust be reduced lower than CLB thrust?

A

NO