Fuel System

Question 1

What are the fuel quantities for pressure refueling

Answer 1

Center: 4,610lbs
Mains: 7,492lbs a side
Total: 19,594lbs

Question 2

What are the fuel quantities for gravity refueling

Answer 2

Mains only: 7,405lbs a side

Total: 14,810lbs

Question 3

How is the fuel moved from the center tank to the main tanks

Answer 3

transfer ejectors

Question 4

How is the fuel moved from the main tanks to the collector tanks

Answer 4

scavenge ejectors

gravity line used as a backup

Question 5

How is the fuel moved from the collector tanks to the engine driven high pressure fuel pump

Answer 5

main ejectors

backed up by boost pumps

Question 6

What is the function of the electric boost pumps

Answer 6

To provide initial fuel for engine start and to back-up the main ejectors

Question 7

What is the flight deck indication of a high pressure fuel pump failure

Answer 7

Engine flameout

Question 8

What is the maximum fuel imbalance

Answer 8

300 lbs for takeoff

800 lbs for all other phases

Question 9

When will the fuel system automatically begin transferring fuel

Answer 9

200 lb fuel imbalance

Question 10

When are the boost pumps automatically energized

Answer 10

Low pressure from the main ejectors is

detected (if the pumps are armed)

Question 11

Where is the high pressure fuel pump located

Answer 11

N2 accessory gearbox

Question 12

Where is bulk fuel temperature taken

Answer 12

right main tank

Question 13

What is the Minimum Bulk Fuel Temp for take-off

Jet A

Answer 13

-30°C

Question 14

What is the minimum bulk fuel temp during flight

Jet A

Answer 14

above -40°C

Question 15

How is engine fuel heated

Answer 15

Fuel/oil heat

exchanger

Question 16

What is the minimum engine fuel temperature

for takeoff

Answer 16

+5°C

Question 17

What is the takeoff limitation if the center tank has > 500 lbs of fuel

Answer 17

Each main tank must have > 4,400 lbs

Question 18

Which Bus powers the refuel/defuel panel and refuel/defuel SOVs

Answer 18

APU Battery Direct Bus

Question 19

Where is the refuel/defuel panel located

Answer 19

The fuselage forward of right wing

Question 20

Where is the single point adapter located

Answer 20

Right wing root

Question 21

How many ways are available to crossflow fuel

Answer 21

3. Auto, Manual, and Gravity.

Question 22

When will the auto crossflow system stop transferring fuel

Answer 22

When the fuel quantity of the low tank exceeds the other tank by 50 lbs

Question 23

What message will be displayed on EICAS whenever the refuel/defuel panel is switched on

Answer 23

AUTO XFLOW INHIB status message