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KV Prep > Engine > Flashcards

Engine Flashcards

1
Q

What drives the accessory gear box

A

N2 Compressor, which is driven by the high pressure turbine

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2
Q

What items are on the accessory gear box?

A

-FISH OIL+

Fuel pump (3)
IDG (integrated drive generator)
Starter (Air Turbine Starter)
Hydraulic pump

Oil pump
+fadec alternator
FADEC Alternator

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3
Q

What are the rated thrust outputs of the engine?

A

Normal - 12,670

APR - 13790

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4
Q

How many stages is the low pressure turbine?

A

4

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5
Q

How much of the engine’s overall thrust is provided by the N1 Fan?

A

80%

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6
Q

What powers the variable geometry (VG) vanes?

A

Fuel pressure directed by the FADEC

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7
Q

How is fuel heated prior to combustion?

A

Fuel/Oil heat exchanger

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8
Q

How many channels does the FADEC have, and when do the channels change?

A

2 Channels, A and B.

The Channels change when the N2 RPM falls below 7% on every other engine shutdown

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9
Q

How many FADEC Channels are in use at once?

A

1 channel commands the engine while the other channel monitors the controlling channel and is in standby incase the commanding channel fails

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10
Q

Is there ever a time when both FADEC channels will command the engine simultaneously?

A

In an engine overspeed situation both FADEC channels will command the fuel valves to close to bring the speed into the normal range

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11
Q

What happens if both FADEC channels fail or the FADEC loses power?

A

The engine will fail

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12
Q

Can the left engine’s FADEC control the right engine?

A

No

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13
Q

Do the left and right engine’s FADECs cross talk with each other?

A

Yes. They compare engine speed and thrust reverser position information

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14
Q

While cross talking, when will one engine’s FADEC assume the other engine has failed?

A

Difference of at least 15%

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15
Q

When the engine fails, what will the operative engine’s FADEC automatically command?

A

APR in the TOGA detent

MCT in the CLIMB detent

And a proportionate increase throughout the cruise range

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16
Q

What will the FADEC command if the thrust reverser deploys in flight?

A

It will reduce that engine’s thrust to idle

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17
Q

At what speed does the FADEC lock in the final N1 computation during takeoff?

A

65 Kts

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18
Q

What powers the FADEC

A

Aircraft electrical power with an N2 of less than 50%, and the FADEC alternator with an N2 of greater than 50%

19
Q

If we wait for the FADEC to shut the engine down during a hot start, are we guaranteed that the ITT limit will not be exceeded?

A

No

20
Q

Will the engine automatically shutdown for a hot start on the ground?

A

Yes

21
Q

Is there ITT protection and subsequent auto shutdown in flight?

A

No

22
Q

What is the time limit for single engine APR thrust?

A

10 minutes

23
Q

What is the time limit for normal or FLEX thrust?

A

5 minutes

24
Q

When will the L or R OIL LEVEL LO status message appear?

A

Below 57% with the engine running

below 80% with the engine stopped

25
Q

What is FLEX thrust?

A

It is a reduced power setting for takeoff calculated using an assumed temperature

26
Q

When using FLEX thrust for takeoff, what must the PIC verify prior to takeoff?

A

The PIC must verify that the computed thrust displayed on the primary display is equal to or greater than that required in QRH Vol. 1

27
Q

What color will the FLEX thrust rating be displayed in on the primary display?

A

Magenta

28
Q

When is FLEX thrust not permitted?

A

Think ABCDEFG Acronym

Antiskid has failed
Bleeds in use
Contamination
De iced
Engine cannot perform full thrust takeoff
Full thrust required per departure procedure
Gust (wind shear reported)

29
Q

What stages of the engine is bleed air extracted from?

A

6th and 10th stages

30
Q

Can both stages be used at once?

A

No

31
Q

What powers the igniters?

A

Igniter A - AC essential bus

Igniter B - Battery and an inverter

32
Q

When is the use of continuous ignition required? TTFFF

A

Takeoff and landings in contaminated runways
Takeoff with high crosswind component (15 kts or greater)
Flight through moderate or heavier intensity rain
Flight through moderate or heavier intensity turbulance
Flight in the vicinity of thunderstorms

33
Q

When will the continuous ignition fire automatically?

A
  • When the FADEC senses a flameout
  • When approaching a stick shaker during a stall
  • When a disruption of airflow is detected through the engine
34
Q

How are the thrust reversers actuated?

A

Hydrualically

35
Q

How are the thrust reversers locked?

A

Hydraulically, and mechanically

36
Q

What is the maximum ITT for engine start on the ground and in flight?

A

120* C ground

90 * C flight

37
Q

What is the maximum altitude for engine relight

A

FL 210

38
Q

What are the 5 different engine idles? (FALRG)

A 
Flight IDLE
Approach IDLE
Landing IDLE
Reverse IDLE
Ground IDLE
39
Q

When is APR armed for takeoff?

A

When within 8% of target thrust

40
Q

When is the go around mode armed on approach?

A

With the gear extended or the flaps greater than 20

41
Q

What does the blue circle indicate on the N1 Gauge during cruise flight?

A

The maximum thrust setting for cruise (Less then MCT)

42
Q

What are the engine warm up limitations?

A

The engines must remain at idle until the oil pressure is in the normal range. Do not exceed 75% N1 until all indications are in the green or two minutes has passed whichever is longer

43
Q

What is the engine cool down limitation?

A

After landing the engine must be at or near idle thrust for two minutes prior to shutdown

KV Prep (14 decks)

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