Fuel Questions

Question 1

How many fuel tanks does the airplane have?

Answer 1

• 2 integral tanks

Question 2

Where is fuel tank temperature taken?

Answer 2

• Left tank

Question 3

What types of fuel pumps are in each wing?

Answer 3

• Primary ejector pump
• ACMP
• DCMP (right tank)
• 3 scavenge ejector pumps

Question 4

What is the Primary ejector pump?

Answer 4

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

Question 5

What is the purpose of the ACMP?

Answer 5

• Back-up pump in case of primary ejector pump failure
• Engine start
• Crossfeed operations

Question 6

What is the purpose of the DCMP?

Answer 6

• Used for APU or engine start if AC power or the ACMP is not available

Question 7

What is the purpose of the scavenge pumps?

Answer 7

• Maintains fuel level in the collector box

Question 8

What pump(s) is used once an engine is started?

Answer 8

• Primary (main) ejector pump

Question 9

What is the purpose of the collector box?

Answer 9

• Keeps the fuel pumps submerged
• Ensures constant fuel flow to the respective engine

Question 10

What is the surge/vent tank?

Answer 10

• 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

Question 11

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

Answer 11

• No

Question 12

What happens when the crossfeed switch is selected to LOW 1?

Answer 12

• Crossfeed valve is opened
• Commands the ACMP 2 to ‘ON’ to provide fuel from the right tank to both engines

Question 13

What is the only way to close the engine fuel SOV?

Answer 13

• Pull the associated engine fire extinguishing handle

Question 14

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

Answer 14

• 660 lb. of fuel remaining in the associated tank
• Fuel Low Level caution (gauge indications turn yellow only) occurs at 1320 lb. in associated tank