Fuel

Question 1

How many fuel tanks are there?

Answer 1

There are 2 fuel tanks, one in each wing.

Question 2

What is the function of the collector box in each wing?

Answer 2

The collector box keeps fuel pumps submerged to ensure constant fuel flow to the respective engine.

Question 3

What does the vent system do?

Answer 3

The vent system ensures pressure between the tank and ambient remains within structural limits.

Question 4

What is the total fuel quantity?

Answer 4

The total fuel quantity is 20,935 lb.

Question 5

At what weight does the Fuel Low Level warning occur?

Answer 5

The Fuel Low Level warning occurs at 660 lb in the respective tank.

Question 6

What is the minimum fuel temperature taken from the left wing?

Answer 6

The minimum fuel temperature is -37°C.

Question 7

How many engine-driven fuel pumps are there?

Answer 7

There are 2 engine-driven pumps.

Question 8

What types of ejector pumps are present?

Answer 8

There are 2 primary (main) ejector pumps and 6 scavenge ejector pumps.

Question 9

What type of electric pumps are included?

Answer 9

There are 2 AC electric pumps and 1 DC electric pump.

Question 10

What is the primary function of engine-driven pumps?

Answer 10

Engine-driven pumps are the primary fuel source to the engine.

Question 11

What do ejector pumps maintain?

Answer 11

Ejector pumps maintain head pressure in the fuel line going to the respective engine.

Question 12

What is the function of scavenge pumps?

Answer 12

Scavenge pumps maintain adequate fuel level in the collector tank.

Question 13

What is the purpose of AC fuel pumps?

Answer 13

AC fuel pumps are back-up for the ejector pumps, used for engine starts, and during crossfeed operations.

Question 14

What does AC Pump 2 provide fuel for?

Answer 14

AC Pump 2 provides fuel to the APU when engine-driven pump 2 is not running.

Question 15

Where is the DC fuel pump installed?

Answer 15

The DC fuel pump is installed only in the right wing.

Question 16

What does the DC fuel pump provide?

Answer 16

The DC fuel pump provides pressurized fuel for normal APU start when AC power or AC fuel pump 2 is not available.

Question 17

What is fuel crossfeed?

Answer 17

Allows fuel to both engines from one tank and is used to correct fuel imbalance.

Question 18

What is the maximum fuel imbalance?

Answer 18

794 lb. (CAS message appears at about 800 lb.)

Question 19

At How many pounds does the CAS message for imbalanced fuel go away?

Answer 19

When fuel is within 100 lb. balanced.

Question 20

What happens when LOW 1 is indicated?

Answer 20

The right wing tank electric pump turns ON and the X-FEED valve opens.

Question 21

What happens when LOW 2 is indicated?

Answer 21

The left wing tank electric pump turns ON and the X-FEED valve opens.

Question 22

How are engine fuel shutoff valves operated?

Answer 22

Only the respective fire handles in the cockpit will close the respective shutoff valves.

Question 23

What are the refueling options?

Answer 23

Single-point or over wing.

Question 24

Which battery powers the refueling and defueling system?

Answer 24

Powered by BATT 2 or DC buses.

Question 25

How many fuel tanks does the airplane have?

Answer 25

2 integral tanks.

Question 26

Where is fuel tank temperature taken?

Answer 26

Left tank.

Question 27

What types of fuel pumps are in each wing?

Answer 27

Primary ejector pump, ACMP, DCMP (right tank), and 3 scavenge ejector pumps.

Question 28

How does the Primary ejector pump work?

Answer 28

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

Question 29

What is the purpose of the ACMP?

Answer 29

Back-up pump in case of primary ejector pump failure, engine start, and crossfeed operations.

Question 30

What is the purpose of the DCMP?

Answer 30

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

Question 31

What is the purpose of the scavenge pumps?

Answer 31

Maintains fuel level in the collector box.

Question 32

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

Answer 32

Primary (main) ejector pump.

Question 33

What is the 2 purposes of the collector box?

Answer 33

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

Question 34

What is the 2 uses surge/vent tank?

Answer 34

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 35

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

Answer 35

No

Question 36

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

Answer 36

Crossfeed valve is opened ## Footnote Commands the ACMP 2 to ON to provide fuel from the right tank to both engines

Question 37

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

Answer 37

Pull the associated engine fire extinguishing handle

Question 38

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

Answer 38

660 lb. of fuel remaining in the associated tank

Question 39

Fuel Low Level caution (gauge indications turn yellow only) occurs with how many pounds of fuel in the tank

Answer 39

1320 lbs