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In the event of fuel flowing from the drain mast, check
the leak monitor to determine the area of leakage
center tank or APU fuel supply line.
TMUFUEJ01-T12 LEVEL 3
EFFECTIVITY 28-12-00 Page 24
Apr 30/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 112
ALL
TANK AND VENTING SYSTEM COMPONENTS - LEAK MONITOR
TMUFUEJ01-P12 LEVEL 3
EFFECTIVITY 28-12-00 Page 25
Apr 30/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 113
ALL
THIS PAGE INTENTIONALLY LEFT BLANK
TMUFUEJ01 LEVEL 3
EFFECTIVITY 28-12-00 Page 26
Apr 30/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 114
ALL
28 - FUEL SYSTEM
28-21-00 ENGINE FEED SYSTEM DESCRIPTION
AND OPERATION
CONTENTS:
General
Main Pumps
Canister Check Valves
Pressure Switches
By pass suction Valve
Air Release Valve
LP Valves
Jet Pumps
Crossfeed Valve
Sequence Valve
Intercell Transfer Valve
Fuel Supply Logic
Self Examination
TMUFUKA01 LEVEL 3
EFFECTIVITY 28-21-00 Page 1
Oct 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 115
ALL
ENGINE FEED SYSTEM DESCRIPTION AND OPERATION
GENERAL
The main fuel pump system supplies fuel from the fuel
tanks to the engines. Each tank has two centrifugal
booster pumps.
Fuel is first provided by the center tank pumps and
then by the wing tank pumps when the center tank is
empty.
The crossfeed system divides the engine fuel feed
system into two independent feed systems.
MAIN PUMPS
The main pumps, driven by a 3 phase 115/200 volt AC
motor, have different power supplies. When it is in
operation, each main pump supplies the fuel to:
- its related engine,
- the fuel recirculation cooling system,
- the crossfeed system,
- the refuel/defuel system.
Each wing tank collector comprises:
- two fuel pumps contained in their related
canisters,
- two fuel strainers,
- a suction valve,
- two check valves.
CANISTER CHECK VALVES
The canister allows replacement of the fuel pump
without draining fuel.
The wing fuel pump element is located in a canister
attached to the wing bottom skin, with an inlet
connected to a fuel strainer.
The canister has three outlets:
- one upper outlet is connected to the engine
feed line and contains an internal flap-type
check valve.
- the other upper outlet is connected to a
sequence valve.
- a smaller outlet is connected to the scavenge
jet pumps and the fuel pump pressure switch.
When a fuel pump is not in operation, the two check
valves prevent any reverse flow of fuel through the
pump.
The center fuel pump element is located in a canister
attached to the center tank bottom skin, with a lower
inlet connected to a fuel strainer.
The canister has two outlets:
- an upper outlet is connected to the engine feed
line and contains an internal flap-type check
valve.
- a smaller outlet is connected to the scavenge
jet pumps and the fuel pump pressure switch.
PRESSURE SWITCHES
The pressure switches monitor the output of the pumps
through a pressure pipe.If the pressure from the main
pump decreases to less than 6 psi (0,41 bar) the
pressure switch sends a warning signal to the ECAM
system.
TMUFUKA01-T01 LEVEL 3
EFFECTIVITY 28-21-00 Page 2
Oct 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 116
ALL
ENGINE FEED SYSTEM DESCRIPTION AND OPERATION
TMUFUKA01-P01 LEVEL 3
EFFECTIVITY 28-21-00 Page 3
Oct 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 117
ALL
BY PASS SUCTION VALVE
A by pass suction valve is installed on the engine
feed line, downstream of the main pumps. In case of
complete main pump failure, the by pass suction valve
allows fuel to be sucked from the tank by the engine
driven pumps and thus supply the engine by "gravity".
AIR RELEASE VALVE
The air release valve releases air trapped in the
engine fuel feed line.
The air release valve is installed at the high point
　
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