Fuel

Question 1

How many kilos of fuel can each of the main 2/3 ranks hold?

Answer 1

38,100

Question 2

Which holds more fuel, CENTER, or tanks 2/3 or 1/4?

Answer 2

CENTER
2/3
1/4

Question 3

How many kilos of fuel can tanks 1/4 each hold?

Answer 3

13,300kgs

Question 4

How much do reserve tanks 2/3 hold each?

Answer 4

4000kgs

Question 5

What is the total useable fuel?

Answer 5

163,042 kgs

Question 6

What color are the override pumps until system logic activated them?

Answer 6

Cyan (blue)

Question 7

If all tanks are full which tanks pumps activate to feed the engines first?

Answer 7

CENTER

Question 8

Before takeoff when takeoff flaps are selected, how does the fuel system configuration change?

Answer 8

The cross feed 2/3 close causing main tank 2/3 pumps to feed their respective engines, meanwhile the CENTER tank pumps still provide fuel to engines 1&4

Question 9

After takeoff with flaps up how does the fuel system config change?

Answer 9

The 2/3 cross feed valves open allowing the CENTER pumps to now feed all engines

Question 10

> FUEL LOW CTR L

>FUEL LOW CTR R

Answer 10

In Cruise: Fuel in CENTER tank is less than 1,300 kgs with pump switches on

In Climb: CENTER quant is 3200kgs with pump switches on

Before start: CENTER quantity is <7700kgs and switches on.

Question 11

When system logic senses low pressure from the CENTER wing tank pumps or they are turned off, what does the system automatically do?

Answer 11

Turns on the 2/3 override/JETT pumps

Question 12

How does the remaining fuel get used from the CENTER tank when the pumps are off or low press?

Answer 12

Scavenge pumps transfer it to main tanks 2/3

Question 13

FUEL DISAGREE

Answer 13

Totalizer quantity and FMC calculated fuel disagree.

Objective: decide if a fuel leak is suspected. Select the most accurate fuel value if a leak is not suspected

Question 14

FUEL IMBAL 1-4

Answer 14

Imbalance of 1360kgs between tanks 1-4

Objective: decide if a fuel leak is suspected. To balance fuel if a leak is NOT suspected.

Question 15

FUEL IMBAL 2-3

Answer 15

Fuel imbalance of 2720kgs between main tanks 2/3

Objective: decide if a fuel leak is suspected. To balance fuel if a fuel leak NOT suspected.

Question 16

FUEL IMBALANCE

Answer 16

After the FUEL TANK/ENG message shows there is a longitudinal fuel imbalance of 2,720 kgs between the inboard and outboard main tanks.

Objective: decide if fuel leak suspected. To balance fuel if a fuel leak is not suspected.

Question 17

> FUEL JETT A, B

Answer 17

A fuel jettison system has failed

Question 18

FUEL JETT SYS

Answer 18

Total fuel qty is

Question 19

FUEL JETTISON

Answer 19

Fuel jettison is needed!

Question 20

When either main tank 2/3 reaches 18100, what does system logic do?

Answer 20

Transfers reserve fuel to the tanks 2/3

Question 21

FUEL LEAK ENGINE

Answer 21

An in-flight engine fuel leak is suspected.

Objective: verify there is an ENGINE fuel leak. Identify the leaking engine and shut it down.

Question 22

> FUEL OVD CTR L, R

Answer 22

The CENTER wing tank pump switch is off and one of these occurs:

On the ground: CENTER tank >7700kgs

In Cruise: >1800 kgs

Question 23

FUEL OVRD 2,3 AFT, FWD

Answer 23

Pump pressure is low

Question 24

FUEL PRESS CTR L, R

Answer 24

FUEL LOW CTR L, R Message is shown for 60 sec

Or

Pump pressure low

Question 25

FUEL PRESS ENG 1,2,3,4

Answer 25

Engine on suction feed

Objective: open the cross feed valves to ensure fuel flow. To reconfigure if both pumps are failed in tank 1 or 4.

Question 26

FUEL PUMP 1,4 AFT, FWD

PRESS

Answer 26

Pump pressure is low

Question 27

FUEL PUMP 2,3 AFT, FWD

PRESS

Answer 27

Pump pressure is low

Question 28

FUEL QTY LOW

Answer 28

Qty is <900 kgs in one or more main tanks.

Objective: decide if a fuel
Leak is suspected. Ensure that all fuel is available for use if a fuel leak is not suspected

Question 29

FUEL RES XFR 2,3

Answer 29

Reserve transfer valve NIPS

Question 30

> FUEL TANK/ENG

Answer 30

One of these occurs with the cross feed valve 1 or 4 open:

Main tank 2 is <=equal to tank 1

Main tank 3 is <= to tank 4

This indicates it is time to go
direct tank to engine feed.

Basically it’s telling you to stop feeding off the inboards only with the overrides and let each engine take its own feed to keep even balance across the wing.

Turno off 2/3 override pumps then close XFEED valves 1/4

Keep this config til landing

Question 31

FUEL TEMP LOW

Answer 31

Fuel temp near min

Question 32

How much fuel can you jettison from the center tank and main tanks?

Answer 32

All the CENTER and up to the standpipes in the mains

Question 33

FURL TEMP SYS

Answer 33

Fuel temp indication has failed

Question 34

FUEL XFEED 1,4

Answer 34

Fuel XFEED valve NIPS

Question 35

Must you close the fuel jettison nozzles after the jettison is complete?

Answer 35

Yes and turn the system off

The system can be confirmed to be deactivated when the jettison synoptic disappears

Question 36

FUEL XFEED 2,3

Answer 36

Fuel XFEED valve NIPS

Question 37

> XFEED CONFIG

Answer 37

Fuel cross feed valve Not in CORRECT position

Question 38

> FUEL XFER 1+4

Answer 38

FUEL XFER MAIN 1&4 Switch is on and one of these occurs:

Airplane on the ground
Inflight: the inboard main tank quantities are more than the outboard main tank quantities

Question 39

> JETT NOZ ON

Answer 39

Both jettison nozzle valves are open

Question 40

> JETT NOZ ON L, R

Answer 40

A JETT NOZ Valve is open

Question 41

> JETT NOZZLE L, R

VALVE

Answer 41

Fuel JETT nozzle valve NIPS

Question 42

> SCAV PUMP ON

Answer 42

On the ground the CENTER wing tank scavenge pump operates