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RJET E170 Study Guide 12B > Fuel > Flashcards

Fuel Flashcards

1
Q

How many fuel tanks does the aircraft have?

A

2 integral wing tanks

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2
Q

Where would the fuel system indications and parameters be displayed?

A

On the MFD synoptic pages and the EICAS

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3
Q

How do you reset the fuel used?

A

NAV, select 3R, Press DEL, select 2L

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4
Q

What is the total fuel capacity?

A

20,935

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5
Q

How much usable and unusable fuel is in each tank?

A

Usable - 10,392.5 lbs

Unusable - 75 lbs

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6
Q

What is the fuel density?

A

6.767 lbs/US GAL

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7
Q

What would be the indication of a fuel imbalance?

A

An EICAS FUEL IMBALANCE caution is displayed when the imbalance exceeds 800 lbs and remains until the imbalance is less then 100 lbs

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8
Q

Where is the refueling door located?

A

Right wing

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9
Q

Can the aircraft be over-wing fueled?

A

Yes, by two manual refueling ports, one on each wing

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10
Q

Can you refuel the airplane without APU/EXT power?

A

Yes

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11
Q

Does the aircraft have collector tanks?

A

Yes

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12
Q

Will an inop ejector pump give an EICAS indication?

A

Yes

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13
Q

Where is the fuel tank temp taken from?

A

Left tank

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14
Q

What types of furl pumps are in each wing?

A
  • Primary ejector pump
  • ACMP
  • DCMP (right only)
  • 3 scavenge ejector pumps
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15
Q

What is the primary ejector pump?

A
  • Venturi pump with no moving parts and no electrical power used by the respective engine
  • Powered by motive flow
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16
Q

What is the purpose of the AC fuel pumps?

A
  • Backup pump, supplying fuel to the engine in the event of ejector pump failure or during engine start
  • Supply fuel to the APU when the engine is not running
  • X-feed ops
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17
Q

What happens when the AC PUMP 1 (2) and DC PUMP selector knob is in AUTO?

A

Automatically operates the associated AC or DC fuel pump according to system logic

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18
Q

Does the aircraft have a DC pump?

A

Yes on the right side

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19
Q

What is the only thing that closes an engine shutoff valve?

A

Fire handle

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20
Q

What is the purpose of the DC fuel pump

A

Ir provides pressurized fuel for normal operation APU operation and engine start, when AC power or the AC pump is not available

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21
Q

What is the purpose of scavenge pumps?

A

Maintains fuel level in the collector box

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22
Q

What does the OFF position of the fuel crossed selector knob do?

A

Closes the crossed valve

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23
Q

What does the OFF position of the DC fuel pump knob do?

A

Deactivates the DC fuel pump

24
Q

What does the OFF position of the AC FUEL selector knob do? ON position?

A

OFF: Deactivates the associated AC pump
ON: Activates the associated AC pump

25
Q

What pump is used once an engine is started?

A

Associated primary ejector pump

26
Q

What is the purpose of the collector box?

A
  • Keeps fuel pumps submerged

- Ensures constant fuel flow to the respective engine

27
Q

What is the surge/vent tank

A
  • Collects fuel during wing-down maneuvers and returns it to the main tank once the wings are level
  • Equalizes tank pressure with atmosphere in flight and during refueling
28
Q

What protects the fuel tank from over-pressurization

A

Pressure relief valve

29
Q

Can fuel be transferred from tank to tank or be dumped overboard?

A

No

30
Q

When does the x-feed valve open automatically?

A

During refueling operations

31
Q

How is the fuel cross-fed during flight

A

Select LOW 1 or LOW 2 with AC PUMPS in AUTO

32
Q

If you start to crossed before you get the fuel imbalance EICAS at 800 lbs, will you get an indication to stop the crossfeed?

A

No

33
Q

At what fuel level do you get the EICAS “FUEL IMBALANCE” and what is the max fuel imbalance limitation?

A

800 lbs, 794 lbs

34
Q

How many magnetic level indicators are on each wing?

A

3

35
Q

How would you correct a fuel imbalance?

A

Position the crossed selector knob to the tank to the low side as required

36
Q

Will setting AC PUMP 1 or 2 selector knob to any position other than AUTO override the x-feed command?

A

Yes

37
Q

What happens when the crossed switch is selected to LOW 1

A
  • Crossend valve is opened

- Automatically activates the right AC fuel pump (AC FUEL PUMP 2), supplying from the right tank to both engines

38
Q

Do AC pumps continuously run during normal operations

A

No, but it does run during an engine start

39
Q

What does the LOW 1 (2) position on the fuel crossed selector knob do?

A

Opens the crossed valve and turns on the opposite AC fuel pump

40
Q

What is the power source for AC PUMP 1?

AC PUMP 2?

A
  • AC BUS 1

- AC ESS BUS

41
Q

APU normally gets fuel from where?

A

Right wing tank

42
Q

What is an alternate method for determining fuel quantity if the fueling panel did not work?

A
  • Magnetic fuel level indicators or reading the fuel on the MFD or EICAS
  • Maintenance function only
43
Q

What is the only way to close the engine fuel SOV

A

Pull the associated fire handle

44
Q

How would you check the fuel quantity if the electric fuel quantity indicator fails?

A

With the magnetic indicators

45
Q

When will the FUEL 1 (2) LO LEVEL EICAS be presented?

A

660 lbs of fuel remaining in the associated tank

46
Q

The DC Fuel pump is located where and can be used for what?

A

Is located on the right wing tank and can be used in flight and on the ground

47
Q

Why do you have a DC pump?

A

RAT/batteries or DC GPU

48
Q

Why during dual engine failure do you put the fuel crossed to LOW 1?

A

to allow the DC pump to get fuel to the #1 engine when on RAT/batteries

49
Q

How can you determine if you have a fuel leak?

A
  • By the QRH, but here are some signs:
  • Visual observations of fuel spray from the strut/engine, excessive engine fuel flow, total fuel quantity reducing at an abnormal rate, fuel imbalance
50
Q

With the engines running, through which pumps are the engines and APU fed?

A

Primary ejector pumps

51
Q

Can Republic Airlines operate into reserve fuel if needed? If yes, what will the pilot need to do?

A

Yes, declare Min Fuel with ATC and do not accept delays

52
Q

How does Republic Airlines calculate EXTRA fuel?

A

Minimum of 25 mins of extra fuel calculated using a holding burn rate at 10,000 ft

53
Q

When should a fuel emergency be declared? When should Min Fuel be declared?

A

Emergency: When projected fuel consumption will result in landing with less than 30 minutes of fuel
Min Fuel - When projected fuel consumption will result in landing with less than 45 mins of fuel

54
Q

Should you continue knowing you will be landing in a fuel emergency?

A

No

55
Q

What are the Amber and Red fuel numbers for the E170?

A

Amber - 1320/side

Red - 660/side

RJET E170 Study Guide 12B (16 decks)

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