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Operations manuals > Fuel > Flashcards

Fuel Flashcards

1
Q

What is the total capacity of the fuel tanks?

A

18728 KG

Aircraft technical Dec 12

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2
Q

What is the capacity of the center fuel tank?

A

6476 kg

Aircraft technical Dec 12

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3
Q

What is the capacity of each inner wing tank?

A

5435KG

Aircraft technical Dec 12

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4
Q

What is the capacity of each outer wing tank?

A

691kg

Aircraft technical Dec 12

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5
Q

In which order do the tanks feed the fuel system?

A
  1. Inner tanks until 500kg used in each
  2. Center tank until empty
  3. Inner tanks until 750kg remaining in each
  4. Outer tanks by transferring to inner tanks

Aircraft technical Dec 12

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6
Q

What are the functions of the fuel system?

A
  • 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

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7
Q

How many main fuel pumps have newer MSN aircraft?

A

Four main fuel pumps

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8
Q

How many main fuel pumps have the older MSN aircraft?

A

Six

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9
Q

From which tank do newer MSN aircraft supply fuel from?

A

The inner tanks

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10
Q

From which tank do older MAN aircraft supply the fuel from?

A

The center of inner tanks

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11
Q

How can the low pressure fuel valves be closed?

A
  • the engine master switch

- the engine fire push button

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11
Q

How do older msn aircraft ensure correct sequence of fuel delivery?

A

Via pressure relief valves.

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12
Q

What is the function of the fuel intertank transfer valves?

A

Fuel transfer from outer to inner tank.

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13
Q

What is the function of the fuel crossfeed valve?

A

Allows fuel to feed both engines from one side or one engine from both sides.

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14
Q

What is the function of the fuel suction valves?

A

Allows engines to be fed by gravity if inner tank pumps fail.

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15
Q

How are the fuel suction valves closed in normal operation?

A

By pumps pressure.

16
Q

What is the fuel feed sequence on older msn aircraft?

A
  • center tank
  • inner tank (to 750kg)
  • outer tanks (fuel transfers to inner tanks)
17
Q

What is the fuel feed sequence on newer MSN aircraft?

A
  • center tank (fuel transfers to inner)
  • inner tanks (to 750kg)
  • outer tanks (fuel transfers to inner tank)
18
Q

How does fuel flow from the center tank to the inner tanks on newer MSN aircraft?

A

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.

19
Q

What is used to cool the IDG?

A

Fuel

20
Q

Where does the fuel which is used to cool the IDG go?

A

Returns in the outer tank.

21
Q

What is the function of the fuel tank inerting system?

A

Reduce flammability

22
Q

What system reduces the flammability of the fuel tank?

A

Fuel inerting system.

23
Q

Where is the fuel inerting system installed?

A

Center tank only.

24
Q

How does the fuel inerting system reduce flammability?

A

It produces oxygen depleted air to replace ambient air in the center tank.

25
Q

What is the oxygen percentage of the oxygen depleted air produced by the fuel inerting system?

A

Less than 12%

26
Q

When do the center tank pumps run?

A
  • at engine start for 2 minutes
  • if slats are retracted
  • stops 5 minutes after center tank low level
27
Q

What does it mean if the last two digits of the fuel indication have an amber line across?

A

FQI inaccurate

Operations manuals (20 decks)

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