Powerplant

Question 1

What drives the accessory gear box?

Answer 1

The N2 compressor, which is driven bu the high pressure turbine.

Question 2

What items are on the accessory gear box?

Answer 2

• Hydraulic pump
• Fuel pump (3 interconnected on common shaft)
• Oil pump (integral pump & reservoir)
• FADEC alternator
• Integrated drive generator
• Air turbine starter

Question 3

There are three interconnected fuel pumps within the accessory gear box. What are they?

Answer 3

• Low pressure pump
• High pressure pump
• Motive flow pump

Question 4

What are the rated thrust outputs of the engines?

Answer 4

Normal is 12,670 and APR is 13,790

Question 5

What drives the N1 fan?

Answer 5

The low pressure turbine.

Question 6

How many stages is the low pressure turbine?

Answer 6

Four

Question 7

What comprises an engine stage?

Answer 7

A stage includes a set of stators and rotors.

Question 8

How much of the egine’s overall thrust is provided by the N1 fan?

Answer 8

80%

Question 9

What powers the Variable Geometry (VG) vanes?

Answer 9

Fuel pressure directed by the FADEC.

Question 10

What is the operability valve?

Answer 10

The operability valve works in conjunction with the VG vanes to remove internal air pressure from the compressor section of the engine reducing compressor stall/

Question 11

What powers the operability valve?

Answer 11

Fuel pressure directed by the FADEC.

Question 12

How is fuel heated prior to combustion?

Answer 12

Through the use of a fuel/oil heat exchanger.

Question 13

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

Answer 13

Two. The channels change with the N2 RPM falls below 7% on every other engine shutdown.

Question 14

How many FADEC channels are in use at once?

Answer 14

One channel commands the engine while the other channel monitors the controlling channel and is in standby in case the commanding channel fails.

Question 15

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

Answer 15

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

Question 16

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

Answer 16

The engine will fail.

Question 17

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

Answer 17

No.

Question 18

Do the left and right engine’s FADECs cross talk with one another?

Answer 18

Yes. They compare engine speed and thrust reverser information.

Question 19

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

Answer 19

When there is a difference of at least 15% N1.

Question 20

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

Answer 20

APR in the TOGA detent, MCT in the climb detent, and a proportionate increase throughout the cruise range.

Question 21

What will the FADEC command is a thrust reverser deploys in flight?

Answer 21

It will reduce that engine’s thrust to idle.

Question 22

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

Answer 22

65 KIAS.

Question 23

What powers the FADEC?

Answer 23

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

Question 24

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

Answer 24

No.

Question 25

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

Answer 25

Yes.

Question 26

Is there ITT protection and subsequent auto shutdown in flight?

Answer 26

No.

Question 27

What is the time limit for single engine APR thrust?

Answer 27

10 minutes.

Question 28

What is the time limit for normal or FLEX thrust?

Answer 28

5 minutes.

Question 29

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

Answer 29

Below 57% with the engine running and below 80% with the engine stopped.

Question 30

What is FLEX thrust?

Answer 30

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

Question 31

When using FLEX for takeoff, what must the pilot in command verify prior to takeoff?

Answer 31

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

Question 32

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

Answer 32

Magenta.

Question 33

When is FLEX thrust not permitted?

Answer 33

* Wing and/or cowl anti-ice bleeds are in use. * Runway is contaminated with standing water, slush, snow, or ice. * Warnings or forecasts of windshear or downdrafts exist. * Antiskid system is inoperative.

Question 34

What stages of the engine is bleed air extracted from?

Answer 34

6th and 10th stage.

Question 35

Can both stages be used at once?

Answer 35

No.

Question 36

What powers the igniters?

Answer 36

Igniter A is powered by the AC essential bus, and igniter B is powered by the aircraft battery and an inverter.

Question 37

When is the use of continuous ignition required?

Answer 37

* Flight in the vicinity of thunderstorms. * Flight through moderate or severe turbulence. * Flight through moderate or severe rain. * Operations on a contaminated runway.

Question 38

When will the continous ignition fire automatically?

Answer 38

* When the FADEC senses a flameout. * When approaching a stickshaker during a stall. * When a disruption of airflow is detected through the engine.

Question 39

How are the thrust reversers actuated?

Answer 39

Hydraulically.

Question 40

How are the thrust reversers locked?

Answer 40

Hydraulically, and mechanically.

Question 41

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

Answer 41

120 on the ground, 90 in flight.

Question 42

What is the maximum altitude for engine re-light?

Answer 42

FL210

Question 43

What are the five different engine idles?

Answer 43

* Flight idle * Approach idle * Landing idle * Reverse idle * Ground idle

Question 44

When is APR armed on takeoff?

Answer 44

When within 8% of target thrust.

Question 45

When is the go-around mode armed on approach?

Answer 45

With the gear extended or the flaps greater than 20.

Question 46

What does the blue circle indicate on the N1 guage during cruise (CRZ) flight?

Answer 46

The maximum thrust setting for cruise (less than MCT).

Question 47

What are the engine warm up limitations?

Answer 47

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, which ever is greater.

Question 48

What is the engine cool down limitation?

Answer 48

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