Fuel Flashcards

1
Q

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

A

38,100

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2
Q

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

A

CENTER
2/3
1/4

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3
Q

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

A

13,300kgs

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4
Q

How much do reserve tanks 2/3 hold each?

A

4000kgs

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5
Q

What is the total useable fuel?

A

163,042 kgs

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6
Q

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

A

Cyan (blue)

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7
Q

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

A

CENTER

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8
Q

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

A

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

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9
Q

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

A

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

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10
Q

> FUEL LOW CTR L

>FUEL LOW CTR R

A

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.

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11
Q

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

A

Turns on the 2/3 override/JETT pumps

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12
Q

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

A

Scavenge pumps transfer it to main tanks 2/3

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13
Q

FUEL DISAGREE

A

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

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14
Q

FUEL IMBAL 1-4

A

Imbalance of 1360kgs between tanks 1-4

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

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15
Q

FUEL IMBAL 2-3

A

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.

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16
Q

FUEL IMBALANCE

A

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.

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17
Q

> FUEL JETT A, B

A

A fuel jettison system has failed

18
Q

FUEL JETT SYS

A

Total fuel qty is

19
Q

FUEL JETTISON

A

Fuel jettison is needed!

20
Q

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

A

Transfers reserve fuel to the tanks 2/3

21
Q

FUEL LEAK ENGINE

A

An in-flight engine fuel leak is suspected.

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

22
Q

> FUEL OVD CTR L, R

A

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

On the ground: CENTER tank >7700kgs

In Cruise: >1800 kgs

23
Q

FUEL OVRD 2,3 AFT, FWD

A

Pump pressure is low

24
Q

FUEL PRESS CTR L, R

A

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

Or

Pump pressure low

25
FUEL PRESS ENG 1,2,3,4
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.
26
FUEL PUMP 1,4 AFT, FWD PRESS
Pump pressure is low
27
FUEL PUMP 2,3 AFT, FWD PRESS
Pump pressure is low
28
FUEL QTY LOW
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
29
FUEL RES XFR 2,3
Reserve transfer valve NIPS
30
>FUEL TANK/ENG
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
31
FUEL TEMP LOW
Fuel temp near min
32
How much fuel can you jettison from the center tank and main tanks?
All the CENTER and up to the standpipes in the mains
33
FURL TEMP SYS
Fuel temp indication has failed
34
FUEL XFEED 1,4
Fuel XFEED valve NIPS
35
Must you close the fuel jettison nozzles after the jettison is complete?
Yes and turn the system off The system can be confirmed to be deactivated when the jettison synoptic disappears
36
FUEL XFEED 2,3
Fuel XFEED valve NIPS
37
>XFEED CONFIG
Fuel cross feed valve Not in CORRECT position
38
>FUEL XFER 1+4
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
39
>JETT NOZ ON
Both jettison nozzle valves are open
40
>JETT NOZ ON L, R
A JETT NOZ Valve is open
41
> JETT NOZZLE L, R VALVE
Fuel JETT nozzle valve NIPS
42
> SCAV PUMP ON
On the ground the CENTER wing tank scavenge pump operates