Fuel Flashcards
Fuel
How many tanks are there ?
5
• 1 Center (68 T)
• 2 Main in each wing (2 x 16 T)
• 2 surge tanks in each wing
Fuel
What is the Fuel capacity ?
About 101 T
Fuel
What are the Surge tanks used for ?
- Fuel expansion
* Venting
Fuel
Which Fuel pumps have the highest output pressure
• Main tank pumps or
• Center tank pumps ?
The CENTER tank pumps have a higher output pressure than the L and R main tank fuel pumps to ensure center tank fuel is used before main tanks fuel.
Fuel
Can the fuel balancing system be used on the ground with engines shutdown ?
YES, if the APU is running.
Fuel
In which phases of flight can the fuel balance system be used ?
All of them.
Fuel
Can Fuel jettison nozzles be opened on the ground ?
NO
Fuel
What system provides flammability protection for the fuel system ?
The Nitrogen Generation System (NGS).
Fuel
At which rate is fuel jettisoned ?
- With fuel in Center tank ➝ 1.6 T/min
* Without fuel in Center tank ➝ 0.8 T/min
Fuel
What system allows each engine to draw fuel from its respective Main tank if the pump pressure is low ?
Suction feed that bypasses the pumps.
During climb or at high altitude, the engine may not run properly or have a flame out. This is due to diluted air being released from the fuel as pressure decreases.
Fuel
Where is the Jettison time shown ?
On the FUEL synoptic.
Fuel
When is fuel balancing inhibited ?
Any of the following reasons:
- Refueling control panel is used,
- Prior to engine start and the APU is off,
- Fuel balance system is failed,
- A center tank pump is ON,
- On the ground and one or both engines are running,
- In flight and the fuel jettison system is active,
- In flight and FUEL DISAGREE is displayed,
- In flight and the FUEL QTY LOW is displayed,
