Fuel Flashcards
How many fuel tanks does the airplane have?
A
How many fuel tanks does the airplane have?
2
Q
Where is fuel tank temperature taken?
A
Where is fuel tank temperature taken?
3
Q
What types of fuel pumps are in each wing?
A
What types of fuel pumps are in each wing?
Primary ejector pump
ACMP
DCMP (right tank)
3 scavenge ejector pumps
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4
Q
What is the Primary ejector pump?
A
What is the Primary ejector pump?
5
Q
What is the purpose of the ACMP?
A
What is the purpose of the ACMP?
1.Back-up pump in case of primary ejector pump failure
2.Engine start
3.Crossfeed operations
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6
Q
What is the purpose of the DCMP?
A
What is the purpose of the DCMP?
7
Q
What is the purpose of the scavenge pumps?
A
What is the purpose of the scavenge pumps?
8
Q
What pump(s) is used once an engine is started?
A
What pump(s) is used once an engine is started?
9
Q
What is the purpose of the collector box?
A
What is the purpose of the collector box?
Keeps the fuel pumps submerged
Ensures constant fuel flow to the respective engine
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10
Q
What is the surge/vent tank?
A
What is the surge/vent tank?
Collects fuel during wing-down maneuvers and returns it to the main tanks once the wings are level
Equalizes tank pressure with atmosphere in flight and during refueling
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11
Q
Can fuel be transferred from tank-to-tank or be dumped overboard?
A
Can fuel be transferred from tank-to-tank or be dumped overboard?
12
Q
What happens when the crossfeed switch is selected to LOW 1?
A
What happens when the crossfeed switch is selected to LOW 1?
Crossfeed valve is opened
Commands the ACMP 2 to ‘ON’ to provide fuel from the right tank to both engines
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13
Q
What is the only way to close the engine fuel SOV?
A
What is the only way to close the engine fuel SOV?
14
Q
When will the FUEL 1(2) LO LEVEL EICAS be presented?
A
When will the FUEL 1(2) LO LEVEL EICAS be presented?
15
Q
Collector box location?
A
Collector box location?
Inboard section of each wing
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16
Q
What does the vent system do?
A
What does the vent system do?
Ensures pressure between tank and ambient remains within structural
limits
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17
Q
Fuel quantity?
A
Fuel quantity?
18
Q
When does low fuel level warning go on?
A
When does low fuel level warning go on?
19
Q
What is the fuel source for the APU?
A
What is the fuel source for the APU?
20
Q
Where is fuel temperature taken from?
A
Where is fuel temperature taken from?
Left tank
Limit -37 °C
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21
Q
How many engine driven fuel pumps?
A
How many engine driven fuel pumps?
22
Q
How many primary (main) ejector pumps?
A
How many primary (main) ejector pumps?
23
Q
How many Scavenge ejector pumps?
A
How many Scavenge ejector pumps?
24
Q
How many AC electric pumps?
A
How many AC electric pumps? 2
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25
Q
How many DC electric pumps?1
A
How many DC electric pumps?
1
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26
Q
Which pump is the primary fuel source to the engine?
A
Which pump is the primary fuel source to the engine?
Ejector pump (Venturi Pump)/ Back UP AC PUMP/ no moving parts.
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27
Q
What do ejector pumps maintain?
A
What do ejector pumps maintain?
28
Q
What does the engine driven fuel pump do?
A
What does the engine driven fuel pump do?
Provides motive flow to the primary ejector pump
Provides the pressure for motive flow to scavenge pumps
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29
Q
Where are ejector pumps located?
A
Where are ejector pumps located?
30
Q
What do scavenge pumps do?
A
What do scavenge pumps do?
6Total/3 on each side
Maintain adequate fuel level in the collector tank
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31
Q
What do AC fuel pumps do?
A
What do AC fuel pumps do?
They are a back up for the ejector pumps.
Used for engine start. Take Off and landing
Used during crossfeed operations.
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32
Q
What does AC pump 2 provide?
A
What does AC pump 2 provide?
33
Q
What do AC fuel pumps do?
A
What do AC fuel pumps do?
They are a back up for the ejector pumps.
Used for engine start. Take Off and landing
Used during crossfeed operations.
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34
Q
What does the DC fuel pump do?
A
What does the DC fuel pump do?
Provides pressurized fuel for normal APU start when AC power or the AC
fuel pump 2 is not available.
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35
Q
What fuel pump is used for APU start?
A
What fuel pump is used for APU start?
Batteries “ON” only DC fuel pump in right tank
AC powered airplane-ACMP 2 -
Right engine running Ejector fuel pump
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36
Q
What does fuel crossfeed do?
A
What does fuel crossfeed do?
Allows fuel to both engines from one tank.
Used to correct fuel imbalance.
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37
Q
What is the maximum fuel imbalance?
When does the fuel imbalance message clear?
A
What is the maximum fuel imbalance?
794 lbs
When does the fuel imbalance message clear?
When within 100 lbs of being balance
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38
Q
What does ‘LOW 1’ message do?
What does ‘LOW 2’ message do?
A
What does ‘LOW 1’ message do?
Right wing tank electric pump turns ON and X-FEED valve opens.
What does ‘LOW 2’ message do?
39
Q
How do you shut off fuel?
A
How do you shut off fuel?
40
Q
Refueling and defueling
A
Refueling and defueling
Single-point or over wing.
Powered by BATT 2 or DC buses.
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41
Q
crossfeed is not to be used during
A
takeoff and landing
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42
Q
unusable fuel per tank
A
75 lbs
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43
Q
How many water fuel drains?
A
4 drains and is usually done by MX
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44
Q
How many Magnetic Level Indicators are there?
A
3 per wing (6 total)
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45
Q
Does fuel imbalance happens when Eng fail?
A
Does fuel imbalance happens when Eng fail?
Yes
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46
Q
Fuel panel, can fueling be done with no ac power? Can dc power be used? Who can turn it on, ground or Maintenance?
A
Fuel panel, can fueling be done with no ac power? Can dc power be used? Who can turn it on, ground or Maintenance?
No need ac power to pressure fuel.
Either GPU or APU has to be on .DC only turns on the panel by Batt BUS 2
Gravity fueling can be done with no power using top the wings.
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47
Q
What happens when xfeed?
A
What happens when xfeed?
Main ejectors are shut down
