Fuel Flashcards
What is the total capacity of the fuel tanks?
18728 KG
Aircraft technical Dec 12
What is the capacity of the center fuel tank?
6476 kg
Aircraft technical Dec 12
What is the capacity of each inner wing tank?
5435KG
Aircraft technical Dec 12
What is the capacity of each outer wing tank?
691kg
Aircraft technical Dec 12
In which order do the tanks feed the fuel system?
- Inner tanks until 500kg used in each
- Center tank until empty
- Inner tanks until 750kg remaining in each
- Outer tanks by transferring to inner tanks
Aircraft technical Dec 12
What are the functions of the fuel system?
- store fuel in the tanks
- allocate correct quantities to tanks during refueling
- supply fuel to the engines and the APU
- circulate fuel to cool the IDG
- keep fuel in outer wing for wing bending and flutter relief.
Aircraft technical Dec 12
How many main fuel pumps have newer MSN aircraft?
Four main fuel pumps
How many main fuel pumps have the older MSN aircraft?
Six
From which tank do newer MSN aircraft supply fuel from?
The inner tanks
From which tank do older MAN aircraft supply the fuel from?
The center of inner tanks
How can the low pressure fuel valves be closed?
- the engine master switch
- the engine fire push button
How do older msn aircraft ensure correct sequence of fuel delivery?
Via pressure relief valves.
What is the function of the fuel intertank transfer valves?
Fuel transfer from outer to inner tank.
What is the function of the fuel crossfeed valve?
Allows fuel to feed both engines from one side or one engine from both sides.
What is the function of the fuel suction valves?
Allows engines to be fed by gravity if inner tank pumps fail.
How are the fuel suction valves closed in normal operation?
By pumps pressure.
What is the fuel feed sequence on older msn aircraft?
- center tank
- inner tank (to 750kg)
- outer tanks (fuel transfers to inner tanks)
What is the fuel feed sequence on newer MSN aircraft?
- center tank (fuel transfers to inner)
- inner tanks (to 750kg)
- outer tanks (fuel transfers to inner tank)
How does fuel flow from the center tank to the inner tanks on newer MSN aircraft?
The transfer valve is open, fuel from inner tank flows through jet pump and creates suction. The suction moves fuel from the center tank to the inner tank.
What is used to cool the IDG?
Fuel
Where does the fuel which is used to cool the IDG go?
Returns in the outer tank.
What is the function of the fuel tank inerting system?
Reduce flammability
What system reduces the flammability of the fuel tank?
Fuel inerting system.
Where is the fuel inerting system installed?
Center tank only.
