Fuel System

Август 22, 2022

Содержание

2. MAIN PARTS OF THE FUEL SYSTEM FUEL STORAGE PRESSURE REFUELING SYSTEM ENGINE FUEL FEED APU FUEL
3. FUEL SYSTEM Primary purposes of the fuel system: Stores fuel for use by engines and APU
4. FUEL STORAGE These tanks store fuel: Main tank 1 Main tank 2 Center tank The main
6. PRESSURE FUELING SYSTEM The pressure fueling system is used to refuel all tanks and during fuel
8. ENGINE FUEL FEED The engine fuel feed system supplies fuel from the fuel tanks to the
10. APU FUEL FEED This system supplies fuel from any tank to the APU. The APU fuel
12. The defuel system removes fuel from the fuel tanks to the refuel station. The defuel system
13. DEFUELING Pressure Defuel These is used to pressure defuel the tanks: Refuel station Fuel pumps Defuel
15. FUEL INDICATING The Fuel Quantity Indicating System (FQIS) measures fuel weight in the fuel tanks. The
17. FUEL TEMPERATURE INDICATING SYSTEM Purpose The fuel temperature indicating system shows fuel temperature in main tank
18. Components The fuel temperature indicator is a resistance ratiometer instrument. The fuel temperature bulb is a
20. FUEL MEASURING STICK There are six measuring sticks in main tank 1 and main tank 2.
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MAIN PARTS OF THE FUEL SYSTEM

FUEL STORAGE
PRESSURE REFUELING

SYSTEM
ENGINE FUEL FEED
APU FUEL FEED
DEFUELING
FUEL INDICATING
FUEL TEMPERATURE INDICATING SYSTEM
FUEL MEASURING STICK

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FUEL SYSTEM
Primary purposes of the fuel system:
Stores fuel for use

by engines and APU
Supplies fuel to APU
Supplies fuel to engines
The fuel system has these subsystems:
Fuel storage
Pressure fueling
Engine fuel feed
APU fuel feed
Defuel
Fuel quantity indicating system
Fuel temperature indication

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FUEL STORAGE
These tanks store fuel:
Main tank 1
Main

tank 2
Center tank
The main tanks are in the wings. Main tank 1 is in the left wing. Main tank 2 is in the right wing. The center tank is in the fuselage and the inboard section of each wing.

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PRESSURE FUELING SYSTEM
The pressure fueling system is used to refuel all

tanks and during fuel transfer from tank to tank.
The fueling station has these components:
Fueling panel
Fueling manifold
Fueling receptacle
Fueling shutoff valves

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ENGINE FUEL FEED
The engine fuel feed system supplies fuel from the

fuel tanks to the engines.
It is operated from the fuel control panel and the engine start levers.

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APU FUEL FEED
This system supplies fuel from any tank to the

APU.
The APU fuel feed system has these components:
APU dc boost pump (Optional)
APU fuel feed line
APU fuel feed line shroud
APU fuel shutoff valve

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The defuel system removes fuel from the fuel tanks to the

refuel station. The defuel system also permits fuel transfer from one fuel tank to another.
DEFUELING

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DEFUELING
Pressure Defuel
These is used to pressure defuel the tanks:

Refuel station
Fuel pumps
Defuel valve
Crossfeed valve
Suction Defuel
The defuel valve and refuel station are used to suction defuel main tank 1 and main tank 2.

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FUEL INDICATING
The Fuel Quantity Indicating System (FQIS) measures fuel weight

in the fuel tanks. The common display system (CDS) and the fueling panel show fuel quantity.
The fuel quantity indicating system (FQIS) calculates the fuel weight in each fuel tank. The fuel quantity of each tank shows on the common display system (CDS). The fuel quantity processor unit (FQPU) calculates total fuel weight and supplies this to the FMCS.

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FUEL TEMPERATURE INDICATING SYSTEM
Purpose
The fuel temperature indicating system shows

fuel temperature in main tank 1.
Location
The fuel temperature bulb is on the rear spar on main tank 1. The fuel temperature indicator is on the fuel system panel.

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Components
The fuel temperature indicator is a resistance ratiometer instrument.
The

fuel temperature bulb is a resistance unit. The resistance of the fuel temperature bulb changes with fuel temperature.
FUEL TEMPERATURE INDICATING SYSTEM

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FUEL MEASURING STICK
There are six measuring sticks in main tank

1 and main tank 2.
Each fuel measuring stick is on a fuel tank access door. The fuel measuring sticks are numbered 3 through 8, from inboard to outboard.
There are four fuel tank measuring sticks in the center tank. Two fuel tank measuring sticks are on fuel tank access panels and two are on the wing skin. The center tank fuel measuring sticks are numbered 1 and 2, from inboard to outboard.