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UPS 747 > Fuel > Flashcards

Fuel Flashcards

1
Q

The FUEL IMBAL 2-3 EICAS message indicates a ___ pound difference between main tanks 2 and 3.

A

6000

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2
Q

When does the Fuel system management cards (FSMCs) close fuel crossfeed valves 2 and 3 automatically?

A

When flaps extend to the takeoff position on the ground

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3
Q

During preflight, when fuel pump switches are off before engine start and the APU is not running, in which fuel pump are the low pressure lights illuminated?

A

Main tanks 1,2,3,4 both FWD and AFT switches

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4
Q

With a fuel load of 300,000 lbs, which fuel pumps are supplying fuel to the engines during takeoff?

A

Main pumps 2 and 3 provide fuel to their respective engine, CWT override/jettison pumps supply fuel to engines 1 and 4

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5
Q

When AC power is available and the APU running, which fuel pumps operate regardless of switch position?

A

Main pump 2 and 3 AFT

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6
Q

Fuel temperature is measured in which tank?

A

Main tank 1

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7
Q

With a fuel load of 160,000 pounds, if the fuel crossfeed valves 1 and 4 are closed, what EICAS message would be displayed?

A

> X FEED CONFIG

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8
Q

The EICAS advisory alert message FUEL IMBALANCE is displayed under what condition?

A

Fuel difference of 6,000 pounds between Inboard main tanks (2 and 3) and outboard main tanks (1 and 4) after reaching FUEL TANK/ENG condition

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9
Q

How would the crew know Fuel Jettisoning is complete?

A

The fuel to remain quantity indication changes color from magenta to white and flashes for five seconds and the related FUEL OVRD pump EICAS messages display until the Fuel Jettison selector is OFF

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10
Q

During the Before Start flow when would the L&R CWT override/jettison pumps be selected on?

A

With 17,000 pounds or more fuel in the CWT

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11
Q

Which pumps function as fuel jettison pumps?

A

CWT pumps and override pumps 2 and 3

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12
Q

During Fuel Jettison, when do the Main Tank 1 & 4 Transfer Valves open?

A

Either Main Tank 2 or 3 fuel quantity decreases to 20,000 lbs

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13
Q

In cruise, a precautionary shutdown has be accomplished on engine #1. The EICAS advisory message FUEL IMBAL 1-4 appears shortly thereafter. How would the crew properly configure the fuel system to balance fuel?

A

Opening crossfeed valves 1 and 4, closing crossfeed valves 2 and 3, and turning off fuel pumps in tank 4

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14
Q

With CWT tank pumps selected on prior to engine start, during an extended climb the CWT fuel decreases to 7000 lbs. What EICAS message would appear at this time?

A

> FUEL LOW CTR L, R

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15
Q

During climb to initial cruise altitude, the CWT fuel pumps are selected off when the >FUEL LOW CTR L,R EICAS message appears due to the CWT fuel decreasing to 7000 lbs. In this case, when would the crew turn the CWT pumps back on?

A

At cruise and the >FUEL OVD CTR L, R EICAS message appears

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16
Q

With CWT fuel pumps on and providing pressure, what does the cyan color indicate on the fuel synoptic display regarding the override/jettison pumps 2 and 3?

A

Override pumps 2 and 3 are armed for system logic operation

17
Q

If the fuel FUEL TANK/ENG EICAS message was inadvertently canceled without the crew actually accomplishing the procedure (override pumps 2 and 3 left on and crossfeed valves 1 and 4 open), what would be the next EICAS message displayed?

A

FUEL IMBALANCE

18
Q

The FUEL IMBAL 1-4 EICAS message indicates a ___ pound difference between main tanks 1 and 4.

A

3000

19
Q

What is the approximate fuel capacity of main tanks 2 and 3 each?

A

84,000 lbs

20
Q

On the -400, main tank 2 and 3 contain two AC powered override/jettison pumps which can operate to a standpipe level of approximately how many pounds?

A

7000 pounds remaining in the tank

21
Q

On the -400 to what level does main tank 2 or 3 fuel quantity have to decrease to before fuel scavenge begins?

A

Approximately 60,000 pounds

22
Q

How many crossfeed valves are in the fuel manifold?

A

Four

23
Q

What is the approximate fuel capacity of main tanks 1 and 4 each?

A

29,000 lbs

24
Q

Reserve tanks 2 and 3 gravity transfer to main tanks 2 and 3 at what fuel state?

A

Main tanks 2 or 3 fuel quantity reaches 40,200 lbs

25
Q

What is the approximate fuel capacity of the CWT?

A

114,900 lbs

26
Q

If the Fuel Temp Sensor detects a fuel temperature of -37C or below what message will be displayed?

A

FUEL TEMP LOW EICAS Advisory Alert

27
Q

When do crossfeed valves 2 and 3 automatically open?

A

After takeoff, when the flaps are retracted from the takeoff position

28
Q

When do crossfeed valves 2 and 3 automatically close?

A

On the ground, when the flaps are extended to the takeoff position

29
Q

What is the approximate fuel capacity of reserve tanks 2 and 3 each?

A

8,800 lbs

30
Q

What is the standpipe level in main tanks 1 through 4

A

7000 lbs

31
Q

When is the FUEL TANK/ENG EICAS advisory alert message inhibited?

A

When the fuel jettison selector is in the A or B position

32
Q

The EICAS advisory alert message FUEL TANK/ENG is displayed under what condition?

A

Main tank 2 quantity is equal to or less than main tank 1 quantity, or main tank 3 quantity is equal to or less than main tank 4 quantity and crossfeed valves 1 and 4 are open

33
Q

What happens when main fuel tank 2 or 3 fuel quantity decreases to approximately 40,000 pounds?

A

Fuel transfers from reserve fuel tanks 2 and 3 to their related main fuel tank

34
Q

During fuel jettison, what occurs when main tank 2 or 3 fuel quantity decreases to approximately 20,000 pounds?

A

Main tank 1 and 4 transfer valves open

35
Q

The EICAS advisory alert message X FEED CONFIG will display under what conditions?

A

Crossfeed valve 2 or 3 closed and flaps not in takeoff position and crossfeed valve 1 or 4 closed and main tanks not equal

UPS 747 (20 decks)

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