28-fuel

8/12/2019 28-FUEL

1/354

A319/A320/A321TECHNICAL TRAINING MANUAL

MECHANICS / ELECTRICS & AVIONICS COURSE

28 FUEL SYSTEM

8/12/2019 28-FUEL

2/354

8/12/2019 28-FUEL

3/354

This document must be used for training purpose only

Under no circumstances should this document be used as a reference.

It will not be updated.

All rights reserved.

No part of this manual may be reproduced in any form,

by photostat, microfilm, retrieval system, or any other means,

without the prior written permission of Airbus Industrie.

8/12/2019 28-FUEL

4/354

8/12/2019 28-FUEL

5/354

FUEL GENERAL

** System Design Philosophy (1) 1..................

** Tank Usable Capacities (1) 5....................

** ENG and APU Fuel Feed Presentation (1) 11......

** System Controls (1) 15..........................

** Fuel ECAM Page Presentation (1) 19.............

** System Normal Operation (1) 35..................

** Fuel System Warnings (3) 61.....................

STORAGE, VENTING AND RECIRCULATION** Venting System Description/Operation (3) 75....

** Fuel IDG Cooling System Presentation (3) 79....

** Water Drain Valve Operation (2) 85.............

** Tank & Venting System Components (3) 89........

FUEL DISTRIBUTION** Engine Feed SYS Description/Operation (3) 115..

** APU Feed System Description/Operation (3) 121..

** Main Fuel Pump System Components (3) 127.......

** Engine and APU Components (3) 151...............

REFUEL/DEFUEL** Refuel/Defuel System Presentation (1) 175......

** Refuel/Defuel Control Panel (1) 179............

** Cockpit Preselector Presentation (1) 185.......

** Refuel/Defuel System D/O (3) 189................

** Automatic Refuel Operation (2) 195.............

** Manual Refuel Operation (2) 201.................

** Defuel Operation (3) 205........................

** Fuel Transfer Operation (3) 211.................** Refuel/Defuel System Components (3) 219........

FUEL INDICATING

** Quantity Indicating (3) 241.....................

** Level Sensing (3) 247............................

** Manual Measurement (2) 251......................

** QTY Indicating SYS Components (3) 261..........** Fuel Level Sensing Components (3) 279..........

FUEL SYSTEM (A321)** ENG and APU Fuel Feed Presentation (1) 293.....

** System Controls (1) 297.........................

** Fuel ECAM Page Presentation (1) 301............

** System Normal Operation (1) 309.................

** Fuel Transfer Operation (3) 315.................** Quantity Indicating (3) 319.....................

** Level Sensing (3) 325............................

** QTY Indicating SYS Components (3) 331..........

MAINTENANCE PRACTICESSPECIFIC PAGES

** CFDS Specific Page Presentation (3) 343......

_A319/A320/A321 TECHNICAL TRAINING MANUAL

28 FUEL SYSTEMMECHANICS / ELECTRICS & AVIONICS COURSE

UFD4200

EFFECTIVITYALL

28 FUEL SYSTEM

UFD4200 TABLE OF CONTENTS Page

28 CONTENTS

Page i

Dec 31/00

8/12/2019 28-FUEL

6/354



UFD4200

EFFECTIVITYALL

28 FUEL SYSTEM

UFD4200 TABLE OF CONTENTS Page

28 CONTENTS

Page ii

Dec 31/00

THIS PAGE INTENTIONALLY LEFT BLANK

8/12/2019 28-FUEL

7/354

28 - FUEL SYSTEM

28-00-00 SYSTEM DESIGN PHILOSOPHY

CONTENTS:

General

Feed Concept

Management

Self Examination

TMUFUE001LEVEL

1

EFFECTIVITY 28-00-00 Page 1Aug 31/98



UFD4200

Page 1EFFECTIVITYALL

8/12/2019 28-FUEL

8/354

SYSTEM DESIGN PHILOSOPHY

GENERAL

The fuel system stores fuel in 5 tanks. It supplies

fuel to the engines and APU and recirculates fuel to

cool the oil of the IDGs (Integrated Drive Generators).

A vent surge tank is fitted in each wing.

FEED CONCEPT

Engines are supplied by the center tank fuel via the

center tank pumps.

When the center tank fuel has been used, engines are

supplied by the wing tank pumps, first with the inner

cell fuel and then with the outer cell fuel which flows

to the inner cell.

MANAGEMENT

The different functions of the system are:

- Fuel level and temperature sensing, fuel

transfers, fuel recirculation, refuel/defuel

control and monitoring, indications, warnings

and test.

The fuel quantity indicating system comprises:

- 1 Fuel Quantity Indicating Computer (FQIC).

- 2 Fuel Level Sensor Control Units (FLSCUs).

TMUFUE001-T01LEVEL

1




UFD4200


8/12/2019 28-FUEL

9/354

SYSTEM DESIGN PHILOSOPHYTMUFUE001-P01

LEVEL

1




UFD4200


8/12/2019 28-FUEL

10/354

SELF EXAMINATION

Which tanks are the main supply tanks?

A - Center tank and inner cells.

B - Center Tank.

C - Outer Cells.

The Fuel Quantity Indicating System comprises...

A - Two FQICs and two FLSCUs.

B - One FQIC and two FLSCUs.

C - One FQIC and one FLSCU.

TMUFUE001

LEVEL

1




UFD4200


8/12/2019 28-FUEL

11/354

28 - FUEL SYSTEM

28-11-00 TANK USABLE CAPACITIES

CONTENTS:

Wing Tanks

Center Tank

Vent Surge Tanks

Self Examination

TMUFUE201LEVEL

1

EFFECTIVITY 28-11-00Page 1

JUL 31/99



UFD4200


8/12/2019 28-FUEL

12/354

TANK USABLE CAPACITIES

WING TANKS

Fuel is carried in three tanks: the left hand wing

tank, the right hand wing tank and the center tank.

Each wing tank is divided into two cells, the outer

cell and the inner cell.

TMUFUE201-T01LEVEL

1


JUL 31/99



UFD4200

Page 6

EFFECTIVITYALL

8/12/2019 28-FUEL

13/354

TMUFUE201-P01

LEVEL

1

TANK USABLE CAPACITIES - WING TANKS


JUL 31/99



UFD4200

Page 7

EFFECTIVITYALL

8/12/2019 28-FUEL

14/354

TANK USABLE CAPACITIES

CENTER TANK

VENT SURGE TANKS

A vent surge tank is positioned in the outer section

of each wing.

Each fuel tank, when normally full, has two percent

additional space for expansion without spillage into

the vent surge tank.

TMUFUE201-T02

LEVEL

1


JUL 31/99



UFD4200

Page 8

EFFECTIVITYALL

8/12/2019 28-FUEL

15/354

TANK USABLE CAPACITIESTMUFUE201-P02

LEVEL

1


JUL 31/99



UFD4200

Page 9EFFECTIVITY

ALL

8/12/2019 28-FUEL

16/354

SELF EXAMINATION

What is the maximum total fuel capacity?

A - 41291 LBS (18729 KG)

B - 45920 LBS (20866 KG)

C - 52174 LBS (23707 KG)

TMUFUE201

LEVEL

1

EFFECTIVITY

28-11-00Page 6

JUL 31/99



UFD4200

Page 10EFFECTIVITY

ALL

8/12/2019 28-FUEL

17/354

28 - FUEL SYSTEM

28-20-00 ENGINE AND APU FUEL FEEDPRESENTATION

CONTENTS:

Pumps

Sequence Valves

Crossfeed Valve

LP Valves

Pressure SwitchesAPU Pump

Transfer Valves

Air Release Valve

Self Examination

TMUFUE101LEVEL

1

EFFECTIVITY

28-20-00Page 1

Jul 31/98



UFD4200

Page 11EFFECTIVITY

ALL

8/12/2019 28-FUEL

18/354

ENGINE AND APU FUEL FEED PRESENTATION

PUMPS

Each main tank has 2 centrifugal booster pumps capable

of supplying the engines with fuel at the required

pressure and flow rate.

There are 2 pumps per tank.

The wing tank pumps run continuously during normal

operation.

SEQUENCE VALVES

Pressure relief sequence valves on the wing tank pumps

give priority to center tank pump supply.

The sequence valves give priority by limiting wing

tank pumps output pressure.

CROSSFEED VALVE

A CROSSFEED VALVE permits connection of the left and

right engine supply lines.

The crossfeed valve is normally closed.

LP VALVES

The Low Pressure valves isolate the engines or APU

from the fuel supply.

The LP valve is open when the related engine or APU

is running; it closes when engine or APU is shut down

or when FIRE pushbutton is released out.

PRESSURE SWITCHES

A pressure switch for each pump monitors the pump

pressure for the low pressure warning.

APU PUMP

A specific fuel pump supplies the APU if the tank pumps

are not operating. This pump takes fuel from the leftsupply line.

The APU fuel pump is supplied by the AC ESS SHED bus

or the batteries via the static inverter.

TRANSFER VALVES

Transfer valves allow fuel to be transferred from Outer

to Inner cells.

They open when the fuel level reaches low level sensors

in Inner cell.

Two level sensors are installed in each inner cell.

Each sensor controls two transfer valves, one in each

wing, which will open when the first inner cell low

level sensor becomes dry, irrespective of which side.

Once open, the transfer valves close automatically at

the next refuelling.

AIR RELEASE VALVE

Each engine supply line has an Air Release valve at

its highest point to enable the line to be bled.

TMUFUE101-T01LEVEL

1

EFFECTIVITY

28-20-00Page 2

Jul 31/98



UFD4200

Page 12EFFECTIVITY

ALL

8/12/2019 28-FUEL

19/354

TMUFUE101-P01

LEVEL

1

ENGINE AND APU FUEL FEED PRESENTATION

EFFECTIVITY

28-20-00Page 3

Jul 31/98



UFD4200

Page 13EFFECTIVITY

ALL

8/12/2019 28-FUEL

20/354

SELF EXAMINATION

Are wing tank pumps running while center tank is

supplying?

A - Yes, wing tank pumps are always running.

B - No, only when center tank is empty.

C - No, because of center tank pump priority.

The engine LP valve closes when:

A - the fuel booster pumps pressure

decreases.

B - the engine is shut down or the ENG FIRE

pushbutton is released out.

C - the engine fire detection system senses

an engine fire.

When there is a low level in one inner cell:

A - one intercell transfer valve opens.

B - two transfer valves in one wing, open.

C - two transfer valves, one in each wing,

open.

TMUFUE101

LEVEL

1

EFFECTIVITY

28-20-00Page 4

Jul 31/98



UFD4200

Page 14EFFECTIVITY

ALL

8/12/2019 28-FUEL

21/354

28 - FUEL SYSTEM

28-20-00 SYSTEM CONTROLS

CONTENTS:

Tank Pumps

Mode Selector

Center Tank Pumps

Crossfeed

TMUFUE301LEVEL

1

EFFECTIVITY

28-20-00Page 1

Nov 30/95



UFD4200

Page 15EFFECTIVITY

ALL

8/12/2019 28-FUEL

22/354

SYSTEM CONTROLS

TANK PUMPS

When a wing tank pump pushbutton is pressed in, the

related pump runs.

MODE SELECTOR

The MODE SEL pushbutton selects the center tank pumps

to automatic or manual mode.

CENTER TANK PUMPS

With the CTR TK PUMP pushbuttons pressed in, the pump

will be controlled automatically if Auto mode is

selected.

In MAN mode, the CTR TK pumps are manually switched

on or off by the related pump pushbuttons.

CROSSFEED

The XFEED pushbutton controls the crossfeed valve.

The XFEED pushbutton is normally released out, the

Crossfeed valve is closed.

If the pushbutton is pressed in, the valve opens and

the ON white light comes on.

The green OPEN light comes on when the valve is fully

open.

TMUFUE301-T01LEVEL

1

EFFECTIVITY

28-20-00Page 2

Nov 30/95



UFD4200

Page 16EFFECTIVITY

ALL

8/12/2019 28-FUEL

23/354

TMUFUE301-P01

LEVEL

1

SYSTEM CONTROLS

EFFECTIVITY

28-20-00Page 3

Nov 30/95



UFD4200

Page 17EFFECTIVITY

ALL

8/12/2019 28-FUEL

24/354


TMUFUE301

LEVEL

1

EFFECTIVITY

28-20-00Page 4

Nov 30/95



UFD4200

Page 18EFFECTIVITY

ALL

8/12/2019 28-FUEL

25/354

28 - FUEL SYSTEM

28-00-00 FUEL ECAM PAGE PRESENTATION

CONTENTS:

Fuel On Board

Fuel Used

Engine LP Valves

Tank Pumps

Transfer Valves

Crossfeed Valve

APU LP Valve

Fuel Quantities

Fuel Temperatures

TMUFUE501LEVEL

1

EFFECTIVITY

28-00-00Page 1

Jun 30/98



UFD4200

Page 19EFFECTIVITY

ALL

8/12/2019 28-FUEL

26/354

TMUFUE501-P01LEVEL

1

FUEL ECAM PAGE PRESENTATION

EFFECTIVITY

28-00-00Page 2

Jun 30/98



UFD4200

Page 20EFFECTIVITY

ALL

8/12/2019 28-FUEL

27/354

FUEL ECAM PAGE PRESENTATIONTMUFUE501-P02

LEVEL

1

EFFECTIVITY

28-00-00Page 3

Jun 30/98



UFD4200

Page 21EFFECTIVITY

ALL

8/12/2019 28-FUEL

28/354

TMUFUE501-P03

LEVEL

1

FUEL ECAM PAGE PRESENTATION - ENGINE LP VALVES

EFFECTIVITY

28-00-00Page 4

Jun 30/98



UFD4200

Page 22EFFECTIVITY

ALL

8/12/2019 28-FUEL

29/354

FUEL ECAM PAGE PRESENTATION - ENGINE LP VALVESTMUFUE501-P04LEVEL

1

EFFECTIVITY

28-00-00Page 5

Jun 30/98



UFD4200

Page 23EFFECTIVITY

ALL

8/12/2019 28-FUEL

30/354

TMUFUE501-P05LEVEL

1

FUEL ECAM PAGE PRESENTATION - TANK PUMPS

EFFECTIVITY

28-00-00Page 6

Jun 30/98



UFD4200

Page 24EFFECTIVITY

ALL

8/12/2019 28-FUEL

31/354

FUEL ECAM PAGE PRESENTATION - TANK PUMPSTMUFUE501-P06LEVEL

1

EFFECTIVITY

28-00-00Page 7

Jun 30/98



UFD4200

Page 25EFFECTIVITY

ALL

8/12/2019 28-FUEL

32/354

TMUFUE501-P07LEVEL

1

FUEL ECAM PAGE PRESENTATION - TRANSFER VALVES

EFFECTIVITY

28-00-00Page 8

Jun 30/98



UFD4200

Page 26EFFECTIVITY

ALL

8/12/2019 28-FUEL

33/354

FUEL ECAM PAGE PRESENTATION - TRANSFER VALVESTMUFUE501-P08LEVEL

1

EFFECTIVITY

28-00-00Page 9

Jun 30/98



UFD4200

Page 27EFFECTIVITY

ALL

8/12/2019 28-FUEL

34/354

TMUFUE501-P09LEVEL

1

FUEL ECAM PAGE PRESENTATION - CROSSFEED VALVE

EFFECTIVITY

28-00-00Page 10

Jun 30/98



UFD4200

Page 28EFFECTIVITY

ALL

8/12/2019 28-FUEL

35/354

FUEL ECAM PAGE PRESENTATION - CROSSFEED VALVETMUFUE501-P10LEVEL

1

EFFECTIVITY

28-00-00Page 11

Jun 30/98



UFD4200

Page 29EFFECTIVITY

ALL

8/12/2019 28-FUEL

36/354

TMUFUE501-P11LEVEL

1

FUEL ECAM PAGE PRESENTATION - APU LP VALVE

EFFECTIVITY

28-00-00Page 12

Jun 30/98



UFD4200

Page 30EFFECTIVITY

ALL

8/12/2019 28-FUEL

37/354

FUEL ECAM PAGE PRESENTATION - APU LP VALVETMUFUE501-P12LEVE

L

1

EFFECTIVITY

28-00-00Page 13

Jun 30/98



UFD4200

Page 31EFFECTIVITY

ALL

8/12/2019 28-FUEL

38/354

TMUFUE501-P13LEVE

L

1

FUEL ECAM PAGE PRESENTATION

EFFECTIVITY

28-00-00Page 14

Jun 30/98



UFD4200

Page 32EFFECTIVITY

ALL

8/12/2019 28-FUEL

39/354

FUEL ECAM PAGE PRESENTATIONTMUFUE501-P14LEVE

L

1

EFFECTIVITY

28-00-00Page 15

Jun 30/98



UFD4200

Page 33EFFECTIVITY

ALL

8/12/2019 28-FUEL

40/354


TMUFUE501LEVEL

1

EFFECTIVITY

28-00-00

Page 16

Jun 30/98



UFD4200

Page 34EFFECTIVITY

ALL

A319/A320/A321 TECHNICAL TRAINING MANUAL

8/12/2019 28-FUEL

41/354

28 - FUEL SYSTEM

28-20-00 SYSTEM OPERATION

CONTENTS:

Auto Mode

Manual Mode

Self Examination

TMUFUE901LEVEL

1

EFFECTIVITY

28-20-00

Page 1

May 31/00



UFD4200

Page 35EFFECTIVITY

ALL


8/12/2019 28-FUEL

42/354

SYSTEM OPERATION

AUTO MODE

We are on the ground, slats extended and in AUTO MODE.

All tank pump pushbuttons are pressed in: wing tank

pumps run all the time and center tank pumps are not

running because the slats are extended.

TMUFUE901-T01LEVE

L

1

EFFECTIVITY

28-20-00

Page 2

May 31/00



UFD4200

Page 36EFFECTIVITY

ALL


8/12/2019 28-FUEL

43/354

TMUFUE901-P01

LEVE

L

1

SYSTEM OPERATION - AUTO MODE

EFFECTIVITY

28-20-00

Page 3

May 31/00



UFD4200

Page 37EFFECTIVITY

ALL


8/12/2019 28-FUEL

44/354

SYSTEM OPERATION

AUTO MODE (CONTD)

At engine start, the fuel used indication is reset.

The engine identification number becomes white.

TMUFUE901-T02

LEVE

L

1

EFFECTIVITY

28-20-00

Page 4

May 31/00



UFD4200

Page 38EFFECTIVITY

ALL


8/12/2019 28-FUEL

45/354

TMUFUE901-P02

LEVE

L

1

SYSTEM OPERATION - AUTO MODE (CONTD)

EFFECTIVITY

28-20-00

Page 5

May 31/00



UFD4200

Page 39EFFECTIVITY

ALL


8/12/2019 28-FUEL

46/354

SYSTEM OPERATION

AUTO MODE (CONTD)

After engine start, and regardless of the slat

position, the center tank pumps run for 2 minutes.

When running, center tank pumps have priority over

wing tank pumps.

After this delay, center tank pumps stop because slats

are still extended.

TMUFUE901-T03

LEVEL

1

EFFECTIVITY

28-20-00

Page 6

May 31/00

_


UFD4200

Page 40EFFECTIVITY

ALL


8/12/2019 28-FUEL

47/354

TMUFUE901-P03

LEVEL

1


EFFECTIVITY

28-20-00

Page 7

May 31/00

_


UFD4200

Page 41EFFECTIVITY

ALL


8/12/2019 28-FUEL

48/354

SYSTEM OPERATION

AUTO MODE (CONTD)

Thats take-off configuration.

TMUFUE901-T04

LEVEL

1

EFFECTIVITY

28-20-00

Page 8

May 31/00

_


UFD4200

Page 42EFFECTIVITY

ALL


8/12/2019 28-FUEL

49/354

TMUFUE901-P04

LEVEL

1


EFFECTIVITY

28-20-00

Page 9

May 31/00


UFD4200

Page 43EFFECTIVITY

ALL



8/12/2019 28-FUEL

50/354

SYSTEM OPERATION

AUTO MODE (CONTD)

With the slats retracted, the center tank pumps start

again.

TMUFUE901-T05

LEVEL

1

EFFECTIVITY

28-20-00

Page 10

May 31/00


UFD4200

Page 44EFFECTIVITY

ALL



8/12/2019 28-FUEL

51/354

SYSTEM OPERATION - AUTO MODE (CONTD)TMUFUE901-P05

LEVEL

1

EFFECTIVITY

28-20-00

Page 11

May 31/00


UFD4200

Page 45EFFECTIVITY

ALL

8/12/2019 28-FUEL

52/354



8/12/2019 28-FUEL

53/354


LEV

EL

1

EFFECTIVITY

28-20-00

Page 13

May 31/00


UFD4200

Page 47EFFECTIVITY

ALL



8/12/2019 28-FUEL

54/354

SYSTEM OPERATION

AUTO MODE (CONTD)

When the inner cell quantity decreases to a given

value, the transfer valves open automatically and are

latched until the next refuelling. The outer cell fuel

flows to inner cell.

TMUFUE901-T07

LEV

EL

1

EFFECTIVITY

28-20-00

Page 14

May 31/00

U S SC N CS / C CS & V ON CS COU S

UFD4200

Page 48EFFECTIVITY

ALL



8/12/2019 28-FUEL

55/354


LEV

EL

1

EFFECTIVITY

28-20-00

Page 15

May 31/00

UFD4200

Page 49EFFECTIVITY

ALL



8/12/2019 28-FUEL

56/354

SYSTEM OPERATION

AUTO MODE (CONTD)

LANDING ...

When the engines are stopped, the engine identification

numbers become amber.

TMUFUE901-T08

LEV

EL

1

EFFECTIVITY

28-20-00

Page 16

May 31/00

UFD4200

Page 50EFFECTIVITY

ALL



8/12/2019 28-FUEL

57/354


LEV

EL

1

EFFECTIVITY

28-20-00

Page 17

May 31/00

UFD4200

Page 51EFFECTIVITY

ALL



8/12/2019 28-FUEL

58/354

SYSTEM OPERATION

MANUAL MODE

We are in cruise ...

The center tank pumps stop with fuel remaining in the

center tank.

The FAULT light comes on, on the MODE SEL pushbutton.

The LO amber symbols come on as the supply pressure

drops. The fuel auto feed fault message appears on the

engine warning display.

FUEL: AUTO FEED FAULTThe FAULT is indicated if L or R wing tank quantity

becomes less than 5000 KG and the center tank quantity

is above 250 KG.

TMUFUE901-T09

LEV

EL

1

EFFECTIVITY

28-20-00

Page 18

May 31/00

UFD4200

Page 52EFFECTIVITY

ALL



8/12/2019 28-FUEL

59/354

SYSTEM OPERATION - MANUAL MODETMUFUE901-P09

LEV

EL

1

EFFECTIVITY

28-20-00

Page 19

May 31/00

UFD4200

Page 53EFFECTIVITY

ALL



8/12/2019 28-FUEL

60/354

SYSTEM OPERATION

MANUAL MODE (CONTD)

Manual mode engaged.

MAN comes on white. The center tank pumps run again.

TMUFUE901-T10

LEVEL

1

EFFECTIVITY

28-20-00

Page 20

May 31/00

UFD4200

Page 54EFFECTIVITY

ALL



8/12/2019 28-FUEL

61/354

SYSTEM OPERATION - MANUAL MODE (CONTD)TMUFUE901-P10

LEVEL

1

EFFECTIVITY

28-20-00

Page 21

May 31/00

UFD4200

Page 55EFFECTIVITY

ALL



8/12/2019 28-FUEL

62/354

SYSTEM OPERATION

MANUAL MODE (CONTD)

When the center tank is empty, the pump low pressure

warnings come on as the pumps continue to run.

TMUFUE901-T11

LEVEL

1

EFFECTIVITY

28-20-00

Page 22

May 31/00

UFD4200

Page 56EFFECTIVITY

ALL



8/12/2019 28-FUEL

63/354


LEVEL

1

EFFECTIVITY

28-20-00

Page 23

May 31/00

UFD4200

Page 57EFFECTIVITY

ALL

SYSTEM OPERATION



8/12/2019 28-FUEL

64/354

SYSTEM OPERATION

MANUAL MODE (CONTD)

The center tank pump symbols are amber because the

pumps have been manually selected OFF.

TMUFUE901-T12

LEVEL

1

EFFECTIVITY

28-20-00

Page 24

May 31/00

UFD4200

Page 58EFFECTIVITY

ALL



8/12/2019 28-FUEL

65/354


LEVEL

1

EFFECTIVITY

28-20-00

Page 25

May 31/00

UFD4200

Page 59EFFECTIVITY

ALL

SELF EXAMINATION



8/12/2019 28-FUEL

66/354

SELF EXAMINATION

What happens if you extend the slats in flight,with fuel in the center tank, AUTO mode selected?

A - Center tank pumps start.

B - Center tank pumps stop.

C - Center tank pumps stay as they are.

What happens on ground, slats extended, in AUTO

MODE with fuel in the center tank, and one minute

after engines start?

A - Center tank pumps are running.

B - Center tank pumps are stopped.

C - The wing tank pumps are stopped.

What does the MODE SEL pushbutton control?

A - Center and wing tank pumps.

B - Center tank pumps only.

C - Wing tank pumps only.

When the center tank is empty, in AUTO MODE, center

tank pumps:

A - Must be manually switched OFF.

B - Stop automatically and wing tank pumps

start running.

C - Stop automatically.

TMUFUE901

LEVEL

1

EFFECTIVITY

28-20-00

Page 26

May 31/00

UFD4200

Page 60EFFECTIVITY

ALL

8/12/2019 28-FUEL

67/354



8/12/2019 28-FUEL

68/354

TMUFUE401-P01LE

VEL

3

SYSTEM WARNINGS - LEFT TANK PUMP 1 LO PRESS

EFFECTIVITY

28-00-00Page 2

May 31/00

UFD4200

Page 62EFFECTIVITY

ALL



8/12/2019 28-FUEL

69/354

TMUFUE401-P02

LE

VEL

3

SYSTEM WARNINGS - CENTER TANK PUMP 2 LO PRESS

EFFECTIVITY

28-00-00Page 3

May 31/00

UFD4200

Page 63EFFECTIVITY

ALL



8/12/2019 28-FUEL

70/354

TMUFUE401-P03

LE

VEL

3

SYSTEM WARNINGS - RIGHT TANK PUMP 1 + 2 LO PRESS

EFFECTIVITY

28-00-00Page 4

May 31/00

UFD4200

Page 64EFFECTIVITY

ALL



8/12/2019 28-FUEL

71/354

SYSTEM WARNINGS - CENTER TANK PUMPS LO PRESSTMUFUE401-P04

LE

VEL

3

EFFECTIVITY

28-00-00Page 5

May 31/00

UFD4200

Page 65EFFECTIVITY

ALL



8/12/2019 28-FUEL

72/354

SYSTEM WARNINGS - XFEED VALVE FAULTTMUFUE401-P05

LE

VEL

3

EFFECTIVITY

28-00-00Page 6

May 31/00

UFD4200

Page 66EFFECTIVITY

ALL



8/12/2019 28-FUEL

73/354

SYSTEM WARNINGS - ENGINE 1 LP VALVE OPENTMUFUE401-P06

LE

VEL

3

EFFECTIVITY

28-00-00Page 7

May 31/00

UFD4200

Page 67EFFECTIVITY

ALL



8/12/2019 28-FUEL

74/354

SYSTEM WARNINGS - LEFT WING TANK LO LEVELTMUFUE401-P07

LE

VEL

3

EFFECTIVITY

28-00-00Page 8

May 31/00

UFD4200

Page 68EFFECTIVITY

ALL



8/12/2019 28-FUEL

75/354

SYSTEM WARNINGS - RIGHT TRANSFER VALVE CLOSEDTMUFUE401-P08

LEVEL

3

EFFECTIVITY

28-00-00Page 9

May 31/00

UFD4200

Page 69EFFECTIVITY

ALL



8/12/2019 28-FUEL

76/354

SYSTEM WARNINGS - LEFT OUTER TANK HI TEMPTMUFUE401-P09

LEVEL

3

EFFECTIVITY

28-00-00Page 10

May 31/00

UFD4200

Page 70EFFECTIVITY

ALL



8/12/2019 28-FUEL

77/354

SYSTEM WARNINGS - RIGHT INNER TANK LO TEMPTMUFUE401-P10

LEVEL

3

EFFECTIVITY

28-00-00Page 11

May 31/00

UFD4200

Page 71EFFECTIVITY

ALL



8/12/2019 28-FUEL

78/354

SYSTEM WARNINGS - AUTO FEED FAULTTMUFUE401-P11

LEVEL

3

EFFECTIVITY

28-00-00Page 12

May 31/00

UFD4200

Page 72EFFECTIVITY

ALL



8/12/2019 28-FUEL

79/354

SYSTEM WARNINGS - APU LP VALVE FAULTTMUFUE401-P12

LEVEL

3

EFFECTIVITY

28-00-00Page 13

May 31/00

UFD4200

Page 73EFFECTIVITY

ALL



8/12/2019 28-FUEL

80/354


TMUFUE401

LEVEL

3

EFFECTIVITY

28-00-00Page 14

May 31/00

UFD4200

Page 74EFFECTIVITY

ALL

28 - FUEL SYSTEM

28-12-00 VENTING SYSTEM



8/12/2019 28-FUEL

81/354

28 12 00 VENTING SYSTEMDESCRIPTION/OPERATION

CONTENTS:

General

Vent Surge Tank

Wing Tank Venting System

Center Tank Venting System

Overpressure Protection

Vent Float Valves

Self Examination

TMUFUEG01LEVEL

3

EFFECTIVITY

28-12-00Page 1

Jul 31/98

UFD4200

Page 75EFFECTIVITY

ALL

VENTING SYSTEM DESCRIPTION/OPERATION

GENERAL CENTER TANK VENTING SYSTEM



8/12/2019 28-FUEL

82/354

GENERAL

The fuel tank venting system prevents overstressing

of tanks.

VENT SURGE TANK

Each vent surge tank vents to the atmosphere through

a NACA type intake connected with a vent duct.

Inside the vent duct there is a vent protector (flame

arrestor) which reduces the risk of a ground fireigniting the fuel tanks.

Fuel spilled through the vent pipes into the surge

tank is induced back into the outer cell by a scavenge

jet pump using motive power from the wing fuel pumps.

WING TANK VENTING SYSTEM

Each wing tank inner and outer cells vent to the related

vent surge tank. The vent lines are fitted with a ventfloat valve.

The ducts are large enough to ensure that if the

pressure refuelling shut-off failed, excess fuel can

be discharged overboard through the NACA intake.

A rubber check valve installed in the vent line allows

any fuel that finds its way into the vent lines to

drain back into the tank.

CENTER TANK VENTING SYSTEM

The center tank vents into the left hand vent surge

tank.

The center tank vent line is a conventional open line,

large enough for airflow, which is provided with a

check valve.

OVERPRESSURE PROTECTION

Overpressure protectors are installed in the systemto relieve pressure in the tanks that might occur

through vent blockage or a pressure refuelling gallery

failure.

An excess pressure in the outer cell relieves fuel

into the inner cell via an overpressure protector

mounted on rib 15.

An excess pressure in the inner cell or in the Vent

surge tank relieves fuel overboard via an overpressure

protector installed on a tank access panel.The center tank overpressure protector relieves fuel

into the left inner cell.

VENT FLOAT VALVES

Two vent float valves prevent fuel from passing in the

vent lines during aircraft bank manoeuvres.

The open ends of the ducts and the vent float valves

which permit air to vent but not fuel, are positionedat the optimum levels for refueling and normal

ground/flight manoeuvers.

A vent float valve fitted to the outer side of sealed

rib 15 permits air to be vented from the outer cell

to the inner cell during flight manoeuvers.TMUFUEG01-T01L

EVEL

3

EFFECTIVITY

28-12-00Page 2

Jul 31/98

UFD4200

Page 76EFFECTIVITY

ALL



8/12/2019 28-FUEL

83/354

VENTING SYSTEM DESCRIPTION/OPERATIONTMUFUEG01-P01

L

EVEL

3

EFFECTIVITY

28-12-00Page 3

Jul 31/98

UFD4200

Page 77EFFECTIVITY

ALL

SELF EXAMINATION

An excess pressure in the inner cell is relieved



8/12/2019 28-FUEL

84/354

via an overpressure protector:

A - Into the Outer cell.

B - Into the Center tank.

C - Overboard.

The Vent Float Valves:

A - Prevent fuel from entering the vent

lines.

B - Allow fuel to drain from the vent lines.

C - Maintain the fuel tanks pressurized.

TMUFUEG01

LEVEL

3

EFFECTIVITY

28-12-00Page 4

Jul 31/98

UFD4200

Page 78EFFECTIVITY

ALL

28 - FUEL SYSTEM

28-16-00 FUEL IDG COOLING SYSTEM



8/12/2019 28-FUEL

85/354

PRESENTATION

CONTENTS:

Principle

Fuel Return

Pump Logic

Fuel Diverter and Return Valve Control : Low Level

Fuel Diverter and Return Valve Control : Inner Cell

High Temperature

Fuel Diverter and Return Valve Control : Outer CellHigh Temperature

Fuel Diverter and Return Valve Control : Pump Pressure

Loss

Fuel Diverter and Return Valve Control : Overflow

Self Examination

TMUFUEH02LEVEL

3

EFFECTIVITY

28-16-00Page 1

Sep 30/98

UFD4200

Page 79EFFECTIVITY

ALL

FUEL IDG COOLING SYSTEM PRESENTATION

PRINCIPLE PUMP LOGIC



8/12/2019 28-FUEL

86/354

The Integrated Drive Generator oil is cooled by fuel;

a recirculation system is installed.

Some fuel supplying the engines is used to cool the

IDG oil. A Fuel Diverter and Return Valve (FD & RV)

allows the hot fuel to be returned to the Outer cell.

FLSCU1 and EEC1 control the recirculation system in

the left wing.

FLSCU2 and EEC2 control the right wing system.

FUEL RETURN

The recirculated fuel is sent to the outer cell through

a check valve and a pressure holding valve in order

to prevent the fuel from boiling.

The pressure holding valve maintains a pressure of 18

psi in the return line; if the pressure increases,

fuel bleeds through the valve into the Outer cell.

The check valve prevents fuel flow from the wing tankto the engine when the recirculation system is not in

operation.

Note: When the Outer cell is full, the fuel overflows

into the Inner cell through a spill pipe.

As long as fuel is being delivered from the center

tank, the wing tanks are still full and will tend to

overfill, as the returned fuel is delivered to the

wings tanks. In this case the center tank pump stops

when the inner cell reaches the FULL level.

The wing tank pumps will operate until approximately

1100 lbs (500 kg) of fuel have been used i.e.: underfull

sensors reached. The logic circuit then restarts the

Center tank pump.

FD & RV CONTROL : LOW LEVEL

The Fuel Diverter and Return Valve closes when the

fuel level in the inner cell drops to the low level

sensors.

Note: The low level sensor i.e.: IDG shut-off sensor

(38QJ) signals the return valve to close at 620

lbs (280 kg).Note : Closing the return valve will reduce the amount

of unuseable fuel.

TMUFUEH02-T01L

EVEL

3

EFFECTIVITY

28-16-00Page 2

Sep 30/98

UFD4200

Page 80EFFECTIVITY

ALL



8/12/2019 28-FUEL

87/354

TMUFUEH02-P01

L

EVEL

3


EFFECTIVITY

28-16-00Page 3

Sep 30/98

UFD4200

Page 81EFFECTIVITY

ALL


FD & RV CONTROL : INNER CELL HIGH TEMPERATURE FD & RV CONTROL : PUMP PRESSURE LOSS



8/12/2019 28-FUEL

88/354

The Fuel Diverter and Return Valve closes if the fuel

temperature is too high in the inner cell (52.5 degrees

C).

As the returned fuel is hot, the FLSCU prevents

temperature limitation exceedance.

In this case, the FLSCU sends an inhibition signal to

the FADEC for FD & RV control.

FD & RV CONTROL : OUTER CELL HIGH TEMPERATURE

The Fuel Diverter and Return Valve closes if the fuel

temperature is too high in the outer cell (55 degrees

C).

This prevents a large volume of high temperature fuel

from entering the inner cell, in the event of intercell

valve opening.

This also keeps the fuel temperature at an acceptable

level should a tank rupture occur.

The Fuel Diverter and Return Valve closes if a low

pressure is signalled by all pumps of one wing

supplying the related engine and crossfeed valve

closed, or if a low pressure is signalled by all pumps

of both wings with crossfeed valve opened.

This is to reduce fuel flow and allow maximum available

pressure for fuel burn during gravity feeding.

Low pressure is sensed by the pump low pressure switch

and signalled to the fuel level sensing control units(FLSCUs).

FD & RV CONTROL : OVERFLOW

The Fuel Diverter and Return Valve closes if the center

tank pump fails to respond to the logic signals of the

full sensors, causing the wing tank to overflow into

the vent surge tank.

TMUFUEH02-T02L

EVEL

3

EFFECTIVITY

28-16-00Page 4

Sep 30/98

UFD4200

Page 82EFFECTIVITY

ALL



8/12/2019 28-FUEL

89/354

FUEL IDG COOLING SYSTEM PRESENTATIONTMUFUEH02-P02L

EVEL

3

EFFECTIVITY

28-16-00Page 5

Sep 30/98

UFD4200

Page 83EFFECTIVITY

ALL


SELF EXAMINATION



8/12/2019 28-FUEL

90/354

To which tank does the recirculated fuel return ?

A - Wing tank outer cell,

B - Center tank,

C - Wing tank inner cell.

What happens if the fuel level in the inner cell

drops to the low level sensor ?

A - The Fuel Diverter and Return Valve

closes,B - The Fuel Diverter and Return Valve opens,

C - The center tank pumps start.

TMUFUEH02

LEVEL

3

EFFECTIVITY

28-16-00Page 6

Sep 30/98

UFD4200

Page 84EFFECTIVITY

ALL

28 - FUEL SYSTEM

28-11-00 WATER DRAIN VALVE OPERATION



8/12/2019 28-FUEL

91/354

CONTENTS:

General

Job Set Up

Drain Procedure

Close Up

TMUFUEU01LEVEL

2

EFFECTIVITY

28-11-00Page 1

Nov 30/95

UFD4200

Page 85EFFECTIVITY

ALL

WATER DRAIN VALVE OPERATION

GENERAL JOB SET UP



8/12/2019 28-FUEL

92/354

Water which collects beneath the fuel in the lowest

parts of the wing tanks is drained away through small

bore pipes connected to manually

operated water drain valves.

To drain remaining fuel and water:

WARNING: DO NOT GET AIRCRAFT FUEL:

- IN YOUR MOUTH,

- IN YOUR EYES,- ON YOUR SKIN FOR A LONG TIME,

AIRCRAFT FUEL IS POISONOUS.

WARNING: DO NOT GET YOUR CLOTHES SOAKED WITH FUEL.

WARNING: BEFORE YOU REFUEL OR DEFUEL THE AIRCRAFT YOU

MUST MAKE THE AREA AROUND IT SAFE.

IN THE SAFETY AREA DO NOT:

- SMOKE,- MAKE SPARKS OR FIRE,

- USE ANY EQUIPMENT WHICH IS NOT APPROVED FOR

REFUEL/DEFUEL PROCEDURES,

AIRCRAFT FUEL IS FLAMMABLE.

A - Follow the safety precautions

B - Put the access platform below the applicable water

drain valve.

C - Put the container below the applicable water drain

valve.

D - Put "NO SMOKING" warning notices at the limit of

the safety area.

E - On the TEST EQUIPMENT JET PUMP fully retract the

nut (4), the screw (3) and the plunger (1) assembly.F - Install the TEST EQUIPMENT JET PUMP:

(1) Put the hexagonal end of the bush (2) into the

base plate of the drain valve.

(2) Turn the bush (2) through 30 deg.

(3) Turn the nut (4) until it touches and seals

against the bottom skin.

(4) Put the end of the hose into the container.

DRAIN PROCEDURE

A - Hold the bush (2) and turn the screw (3) to the

end of its travel. This causes the plunger (1) to

open the drain valve and the fuel to flow.

CLOSE UP

A - When the fuel flow stops, remove the TEST EQUIPMENT

JET PUMP.

B - Remove all the ground support equipment, the

maintenance equipment, the standard and special

tools and all other items.

C - Make sure that the work area is clean and clear

of tools and other items.TMUFUEU01-T01LEVEL

2

EFFECTIVITY

28-11-00Page 2

Nov 30/95

UFD4200

Page 86EFFECTIVITY

ALL



8/12/2019 28-FUEL

93/354

WATER DRAIN VALVE OPERATIONTMUFUEU01-P01

LEVEL

2

EFFECTIVITY

28-11-00Page 3

Nov 30/95

UFD4200

Page 87EFFECTIVITY

ALL



8/12/2019 28-FUEL

94/354


TMUFUEU01

LEVEL

2

EFFECTIVITY

28-11-00Page 4

Nov 30/95

UFD4200

Page 88EFFECTIVITY

ALL

28 - FUEL SYSTEM

28-12-00 TANK AND VENTING SYSTEM

COMPONENTS



8/12/2019 28-FUEL

95/354

CONTENTS:

Water Drain Valve

Clack Valve

Cap/Adapter Gravity Fill

Overpressure Protector

Fuel Vent Protector

Float vent valve

Check valvePressure Relief Valve

NACA Vent Intake

Vapor Seal

Drain Mast

Leak Monitor

TMUFUEJ01LEVE

L

3

EFFECTIVITY

28-12-00Page 1

Apr 30/96

UFD4200

Page 89EFFECTIVITY

ALL

TANK AND VENTING SYSTEM COMPONENTS

WARNING: Do not get aircraft fuel:

- in your mouth- in your eyes (aircraft fuel is poisonous)

WARNING: Do not remove your respirator while you are

in a fuel tank (unless the fuel-gasconcentration is less than 5 % of LEL)



8/12/2019 28-FUEL

96/354

in your eyes (aircraft fuel is poisonous)

- on your skin for a long time.

WARNING: Obey the fuel safety procedures.

WARNING: Do not get your clothes soaked with fuel. Use

approved protective clothing when you go in

a fuel tank.

WARNING: Make sure that the Landing gear safety-locks

and the wheel chocks are in position.

WARNING: Make sure you put a warning notice in the

cockpit to advise not to operate the flight

controls because:

- persons are near the flight control surfaces

- equipment is near flight control surfaces.

WARNING: Make sure that you have correct fire fighting

equipment available before you start any task

on fuel system.

WARNING: Make sure that all the circuits in maintenance

are isolated before you supply electrical

power to the aircraft.

WARNING: Do not go into a fuel tank until the fuel-gas

concentration is less than 25 % of Lower

Explosive Limit (LEL).

concentration is less than 5 % of LEL).

A high concentration is unhealthy and toxic.

WATER DRAIN VALVE

IDENTIFICATION

FIN: 21QM, 22QM, 23QM, 24QM, 25QM, 26QM, (94QM, 95QM)

LOCATIONZONE: 540, 550, 640, 650, (141, 142)

COMPONENT DESCRIPTION

Periodic operation of the valves ensures that water

does not collect in quantities sufficient to cause

malfunction of the engines.

TMUFUEJ01-T01

LEVEL

3

EFFECTIVITY

28-12-00Page 2

Apr 30/96

UFD4200

Page 90EFFECTIVITY

ALL



8/12/2019 28-FUEL

97/354

TMUFUEJ01-P01

LEVEL

3

TANK AND VENTING SYSTEM COMPONENTS - WATER DRAIN VALVE

EFFECTIVITY

28-12-00Page 3

Apr 30/96

UFD4200

Page 91EFFECTIVITY

ALL


CLACK VALVE

IDENTIFICATION



8/12/2019 28-FUEL

98/354

FIN: None

LOCATION

ZONE: 540, 640


Ribs 1 and 2 form a Collector Box around the wing tank

fuel pumps.Clack valves at the bottom of rib 2 permit fuel to

enter the box but prevent it draining out again.

This ensures a fuel supply at the pumps during wing

down manoeuvres.

TMUFUEJ01-T02

LEVEL

3

EFFECTIVITY

28-12-00Page 4

Apr 30/96

UFD4200

Page 92EFFECTIVITY

ALL



8/12/2019 28-FUEL

99/354

TMUFUEJ01-P02

LEVEL

3

TANK AND VENTING SYSTEM COMPONENTS - CLACK VALVE

EFFECTIVITY

28-12-00Page 5

Apr 30/96

UFD4200

Page 93EFFECTIVITY

ALL


CAP/ADAPTER GRAVITY FILL

IDENTIFICATION



8/12/2019 28-FUEL

100/354

FIN: 42QM, 43QM, 44QM, 45QM

LOCATION

ZONE: 540, 640


An overwing gravity fill cap/adapter is installed in

the top surface of each wing tank, giving direct accessto the outer cell.

The cap is removed by lifting the hinged handle, set

flush in the top of the cap, and turning to unlock.

NOTE: Before gravity refuelling make sure that

transfer valves are open.

TMUFUEJ01-T03

LEVEL

3

EFFECTIVITY

28-12-00Page 6

Apr 30/96

UFD4200

Page 94EFFECTIVITY

ALL



8/12/2019 28-FUEL

101/354

TMUFUEJ01-P03

LEVEL

3

TANK AND VENTING SYSTEM COMPONENTS - CAP/ADAPTER GRAVITY FILL

EFFECTIVITY

28-12-00Page 7

Apr 30/96

UFD4200

Page 95EFFECTIVITY

ALL


OVERPRESSURE PROTECTOR

IDENTIFICATION

FIN: 46QM 47QM 102QM 103QM (96QM)



8/12/2019 28-FUEL

102/354

FIN: 46QM, 47QM, 102QM, 103QM, (96QM)

LOCATION

ZONE: 540, 640, (147)

TMUFUEJ01-T04

LEVEL

3

EFFECTIVITY

28-12-00Page 8

Apr 30/96

UFD4200

Page 96EFFECTIVITY

ALL



8/12/2019 28-FUEL

103/354

TMUFUEJ01-P04

LEVEL

3

TANK AND VENTING SYSTEM COMPONENTS - OVERPRESSURE PROTECTOR

EFFECTIVITY

28-12-00Page 9

Apr 30/96

UFD4200

Page 97EFFECTIVITY

ALL


FUEL VENT PROTECTOR

IDENTIFICATION

FIN: 48QM, 49QM



8/12/2019 28-FUEL

104/354

FIN: 48QM, 49QM

LOCATION

ZONE: 550, 650


Vent protector consists of:

-

ice protector- flame arrestor

Ice protector prevents freezing of the flame arrestor

during descent. Flame arrestor reduces the risk of

ground fire igniting the fuel tank.

TMUFUEJ01-T05

LEVEL

3

EFFECTIVITY

28-12-00Page 10

Apr 30/96

UFD4200

Page 98EFFECTIVITY

ALL



8/12/2019 28-FUEL

105/354

TMUFUEJ01-P05

LEVEL

3

TANK AND VENTING SYSTEM COMPONENTS - FUEL VENT PROTECTOR

EFFECTIVITY

28-12-00Page 11

Apr 30/96

UFD4200

Page 99EFFECTIVITY

ALL


FLOAT VENT VALVE

IDENTIFICATION

FIN: 15QM, 16QM, 17QM, 18QM



8/12/2019 28-FUEL

106/354

LOCATION

ZONE: 540, 640


A float operated arm opens or closes this valve

depending upon the fuel level, to permit air to be

vented.

Valve also opens when:

- inward pressure differential is 0.5 psig

(0.0345 bar) with a full tank.

- outward pressure differential is 1 psig

(0.69 bar) with fuel level below float.

TMUFUEJ01-T06

LEVEL

3

EFFECTIVITY

28-12-00Page 12

Apr 30/96

UFD4200

Page 100EFFECTIVITY

ALL



8/12/2019 28-FUEL

107/354

TANK AND VENTING SYSTEM COMPONENTS - FLOAT VENT VALVETMUFUEJ01-P06

LEVEL

3

EFFECTIVITY

28-12-00Page 13

Apr 30/96

UFD4200

Page 101EFFECTIVITY

ALL


CHECK VALVE

IDENTIFICATION

FIN: 50QM, 51QM, 52QM, 53QM, 120QM, 121QM, 93QM



8/12/2019 28-FUEL

108/354

LOCATION

ZONE: 540, 640, 141


Rubber check valves are installed in the vent lines

to allow any fuel that finds its way into the vent

lines to drain back into the tank.

TMUFUEJ01-T07

LEVEL

3

EFFECTIVITY

28-12-00Page 14

Apr 30/96

UFD4200

Page 102EFFECTIVITY

ALL



8/12/2019 28-FUEL

109/354

TANK AND VENTING SYSTEM COMPONENTS - CHECK VALVETMUFUEJ01-P07

LEVEL

3

EFFECTIVITY

28-12-00Page 15

Apr 30/96

UFD4200

Page 103EFFECTIVITY

ALL


PRESSURE RELIEF VALVE

IDENTIFICATION

FIN: 97QM



8/12/2019 28-FUEL

110/354

LOCATION

ZONE: 142


The pressure relief valve relieves fuel into the RH

wing tank in the event of a center tank refuelling

overflow.

Removal/Installation:

- empty Center and RH wing tanks

- open manhole covers 148AZ and 640AB.

TMUFUEJ01-T08

LEVEL

3

EFFECTIVITY

28-12-00Page 16

Apr 30/96

UFD4200

Page 104EFFECTIVITY

ALL



8/12/2019 28-FUEL

111/354

TANK AND VENTING SYSTEM COMPONENTS - PRESSURE RELIEF VALVETMUFUEJ01-P08

LEVEL

3

EFFECTIVITY

28-12-00Page 17

Apr 30/96

UFD4200

Page 105EFFECTIVITY

ALL


NACA VENT INTAKE

IDENTIFICATION

FIN: None



8/12/2019 28-FUEL

112/354

LOCATION

ZONE: 550, 650


The flush mounted NACA vent intake provides connection

of the vent system to the atmosphere and maintains a

slight positive pressure in the fuel tanks during

forward flight.

The VENT SURGE TANK will hold 50 US gallons before

overflowing into the upturned NACA INTAKE duct.

TMUFUEJ01-T09

LEVEL

3

EFFECTIVITY

28-12-00Page 18

Apr 30/96

UFD4200

Page 106EFFECTIVITY

ALL



8/12/2019 28-FUEL

113/354

TANK AND VENTING SYSTEM COMPONENTS - NACA VENT INTAKETMUFUEJ01-P09

LEVEL

3

EFFECTIVITY

28-12-00Page 19

Apr 30/96

UFD4200

Page 107EFFECTIVITY

ALL


VAPOR SEAL

IDENTIFICATION

FIN: None



8/12/2019 28-FUEL

114/354

LOCATION

ZONE: 140


The vapor seal is a fabric membrane that isolates the

Center tank from the air conditioning compartment

below.

Pressurized air from the air conditioning system flows

through the space between the vapor seal and the tank

bottom to ventilate it.

TMUFUEJ01-T10

LEVEL

3

EFFECTIVITY

28-12-00Page 20

Apr 30/96

UFD4200

Page 108EFFECTIVITY

ALL



8/12/2019 28-FUEL

115/354

TANK AND VENTING SYSTEM COMPONENTS - VAPOR SEALTMUFUEJ01-P10

LEVEL

3

EFFECTIVITY

28-12-00Page 21

Apr 30/96

UFD4200

Page 109EFFECTIVITY

ALL


DRAIN MAST

IDENTIFICATION

FIN: None

LOCATION



8/12/2019 28-FUEL

116/354

LOCATION

ZONE: 140


A system of drains at the rear of the vapor seal conveys

drainage and ventilating (exhaust) air through a drain

mast to atmosphere.

The drain mast is an aluminium fairing bolted to the

underside of the fuselage.

TMUFUEJ01-T11

LEVEL

3

EFFECTIVITY

28-12-00Page 22

Apr 30/96

UFD4200

Page 110EFFECTIVITY

ALL



8/12/2019 28-FUEL

117/354

TANK AND VENTING SYSTEM COMPONENTS - DRAIN MASTTMUFUEJ01-P11

LEVEL

3

EFFECTIVITY

28-12-00Page 23

Apr 30/96

UFD4200

Page 111EFFECTIVITY

ALL

8/12/2019 28-FUEL

118/354



8/12/2019 28-FUEL

119/354

TANK AND VENTING SYSTEM COMPONENTS - LEAK MONITORTMUFUEJ01-P12

LEVEL

3

EFFECTIVITY

28-12-00Page 25

Apr 30/96

UFD4200

Page 113EFFECTIVITY

ALL



8/12/2019 28-FUEL

120/354


TMUFUEJ01

LEVEL

3

EFFECTIVITY

28-12-00Page 26

Apr 30/96

UFD4200

Page 114EFFECTIVITY

ALL

28 - FUEL SYSTEM

28-21-00 ENGINE FEED SYSTEM DESCRIPTIONAND OPERATION

CONTENTS:

General

Main Pumps



8/12/2019 28-FUEL

121/354

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

TMUFUKA01LEVEL

3

EFFECTIVITY

28-21-00Page 1

Oct 31/96

UFD4200

Page 115EFFECTIVITY

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

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



8/12/2019 28-FUEL

122/354

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.

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-T01LEVEL

3

EFFECTIVITY

28-21-00Page 2

Oct 31/96

UFD4200

Page 116EFFECTIVITY

ALL



8/12/2019 28-FUEL

123/354

ENGINE FEED SYSTEM DESCRIPTION AND OPERATIONTMUFUKA01-P01LEVEL

3

EFFECTIVITY

28-21-00Page 3

Oct 31/96

UFD4200

Page 117EFFECTIVITY

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

CROSSFEED VALVE

The crossfeed valve in the center (transfer) tank is

usually in the closed position.

In this position, it divides the main fuel pump system

into two parts (one part for each engine).

When the crossfeed valve is open, either tank can

supply fuel to either engine.



8/12/2019 28-FUEL

124/354

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

between the pump and the LP valve.

LP VALVES

The LP valve is installed on the wing tank front spar,

in the feed line to the engine.

Each LP valve has a actuator with 2 electric motors,

each of which is supplied by different 28VDC power

sources.

The LP valve isolates the engine fuel feed supply atshut-down (normal procedure) or in case of emergency

(engine fire procedure).

JET PUMPS

Center tank scavenge jet pumps move fuel and water

caught in the tank to the related main pump inlet.

Outer cell scavenge jet pumps move the surge tank fuel

to the rear intercell transfer valves.Check valves, in the line between the surge tank,

combined with these jet pumps make sure that fuel can

not enter the surge tank via the pump if the main pumps

are off.

SEQUENCE VALVE

The wing tank pumps are equipped with a sequence valve

to make sure that the center tank is emptied first.

INTERCELL TRANSFER VALVE

The intercell transfer valves enable the outer cell

fuel to flow into the inner cell when the inner cell

low level sensors are dry.

FUEL SUPPLY LOGIC

When all the tanks contain fuel, the center tank willbe emptied first.Keeping a fuel mass in the wings as

long as possible reduces the bending stresses at the

wing roots.

When the center tank fuel has been used, engines are

supplied by the inner cells fuel. The outer cell fuel

flows to the inner cell by gravity through the transfer

valves which open when the inner cell fuel quantity

decreases to a given value.

TMUFUKA01-T0

2LEVEL

3

EFFECTIVITY

28-21-00Page 4

Oct 31/96

UFD4200

Page 118EFFECTIVITY

ALL



8/12/2019 28-FUEL

125/354

ENGINE FEED SYSTEM DESCRIPTION AND OPERATIONTMUFUKA01-P0

2LEVEL

3

EFFECTIVITY

28-21-00Page 5

Oct 31/96

UFD4200

Page 119EFFECTIVITY

ALL

SELF EXAMINATION

In normal operation, which tank will be emptied

first?

A - The inner cell.

B - The center tank.

C - The outer cell.

The by pass suction valve is in operation



8/12/2019 28-FUEL

126/354

The by pass suction valve is in operation,

therefore:

A - The two wing tank pumps are in operation.

B - Only one wing tank pump supplies its

associated engine.

C - Both pumps are stopped.

On ground, the engines are stopped, how do you

close the LP valve?

A - By releasing out the ENG FIRE P/B.

B - By removing electrical power from A/C.

C - The valve is already closed.

TMUFUKA01LE

VEL

3

EFFECTIVITY

28-21-00Page 6

Oct 31/96

UFD4200

Page 120EFFECTIVITY

ALL

28 - FUEL SYSTEM

28-22-00 APU FEED SYSTEM DESCRIPTION ANDOPERATION

CONTENTS:

General

Auxiliary Power Unit (APU) Pump

Canisters



8/12/2019 28-FUEL

127/354

Canisters

Pressure Switch

APU Low pressure (LP) Shut-off Valve

Crossfeed Operation

FUEL VENT Pushbutton

APU MASTER SWITCHSelf Examination

TMUFUKE01LE

VEL

3

EFFECTIVITY

28-22-00Page 1

Jul 31/98

UFD4200

Page 121EFFECTIVITY

ALL

APU FEED SYSTEM DESCRIPTION AND OPERATION

GENERAL

The APU fuel supply system comprises a fuel pump, an

LP fuel valve and an actuator on the rear wall of the

center tank. The fuel supply to the APU is normally

from the left-hand crossfeed line.

The APU LP fuel shut-off system has an LP fuel valve

PRESSURE SWITCH

The pressure switch controls pump operation. The

pressure in the left crossfeed line goes through the

check valve to operate a microswitch.

The APU fuel pump stops if the crossfeed line pressure

reaches 23.3 PSI absolute (1.6 bar) and restarts at



8/12/2019 28-FUEL

128/354

y

that controls the supply of fuel to the APU. If an APU

fire occurs on ground, the APU emergency shut down

system closes the LP fuel valve to stop the flow of

fuel. When the crossfeed valve is open, either engine

feed line (left or right) can supply fuel to the APU.

AUXILIARY POWER UNIT (APU) PUMP

The fuel pressure for the APU comes from either the

engine fuel pumps or the APU fuel pump.

For normal operation, the essential busbar 801XP (115V

AC) supplies the pump motor. When the busbar is not

energized, the static inverter busbar 901XP (115V AC)

supplies the pump motor.

CANISTERS

The canister permits pump replacement even with fuel

in the tanks or in the APU fuel line.

When a pump is removed, the fuel pressure closes the

canister inlet and outlet.

21,7 PSIA (1.5 bar).

APU LOW PRESSURE (LP) SHUT-OFF VALVE

The APU Low Pressure fuel shut-off valve is used toisolate the APU fuel supply line from the left engine

feed line, when the APU does not operate. The two DC

motors in the actuator are supplied from different 28

VDC sources.

The valve opens when:

- The APU MASTER SW is set to ON, or the FUEL

VENT push-button switch in the APU compartment

is pressed and held.

The FUEL VENT pushbutton is used to purge the systemduring ground maintenance.

- The valve closes when:

- The APU MASTER SW is set to OFF.

- The FUEL VENT pushbutton is released.

- The APU FIRE pushbutton switch on the overhead

panel is pressed.

- The APU FIRE SHUT-OFF switch on the panel

forward of the nose landing gear bay is

operated.

- The fire detection system operates on the

ground.

TMUFUKE01-T0

1LEVEL

3

EFFECTIVITY

28-22-00Page 2

Jul 31/98

UFD4200

Page 122EFFECTIVITY

ALL



8/12/2019 28-FUEL

129/354

APU FEED SYSTEM DESCRIPTION AND OPERATIONTMUFUKE01-P0

1

LEVEL

3

EFFECTIVITY

28-22-00Page 3

Jul 31/98

UFD4200

Page 123EFFECTIVITY

ALL

CROSSFEED OPERATION

When the crossfeed valve is open, the right-hand engine

feed line can also supply the APU fuel supply line.

FUEL VENT PUSHBUTTON

When the aircraft is on the ground, it is possible to

operate the pump to purge the fuel line.



8/12/2019 28-FUEL

130/354

A pushbutton (hold) on FR 80 in the APU compartment

is used to operate the pump.

APU MASTER SWITCH

If the APU MASTER SW pushbutton is pressed to ON, the

APU pump will operate if the pump inlet pressure is

below 1.5 bar (21.7 PSI) absolute.

This is initiated automatically through the pressure

switch.

TMUFUKE01-T0

1LEVEL

3

EFFECTIVITY

28-22-00Page 4

Jul 31/98

UFD4200

Page 124EFFECTIVITY

ALL

SELF EXAMINATION

The function of the APU fuel pump pressure switch

is:

A - To signal any pressure to the ECAM.B - To control the pump operation.

C - To shut the APU LP valve in case of fire.

How many motors does the APU LP valve have?



8/12/2019 28-FUEL

131/354

A - One DC motor.

B - Two DC motors.

C - Two motors, one DC (for a battery start)

and one AC.

TMUFUKE01LE

VEL

3

EFFECTIVITY

28-22-00Page 5

Jul 31/98

UFD4200

Page 125EFFECTIVITY

ALL



8/12/2019 28-FUEL

132/354


TMUFUKE01LEVEL

3

EFFECTIVITY

28-22-00Page 6

Jul 31/98

UFD4200

Page 126EFFECTIVITY

ALL

28 - FUEL SYSTEM

28-20-00 MAIN FUEL PUMP SYSTEM COMPONENTS

CONTENTS:Pressure Switch

Air Release Valve

Sequence Valve

Center Tank Fuel Pump

Center Tank Fuel Pump Removal Information



8/12/2019 28-FUEL

133/354

Center Tank Fuel Pump Removal Information

Wing Tank Fuel Pump

Wing Tank Fuel Pump Removal Information

Scavenge Jet Pump

Transfer ValveTransfer Valve Drive

Transfer Valve Actuator

TMUFUEK01LEVEL

3

EFFECTIVITY

28-20-00Page 1

Apr 30/96

UFD4200

Page 127EFFECTIVITY

ALL

MAIN FUEL PUMP SYSTEM COMPONENTS

PRESSURE SWITCH

IDENTIFICATIONFIN: 23QA, 27/24QA, 28QA (39QA, 40QA)

LOCATION

ZONE: 570, 571, 670, 671 (140)



8/12/2019 28-FUEL

134/354


A pressure switch for each fuel pump is mounted on the

outside face of the rear wall of the tanks

TMUFUEK01-T01LEVEL

3

EFFECTIVITY

28-20-00Page 2

Apr 30/96

UFD4200

Page 128EFFECTIVITY

ALL



8/12/2019 28-FUEL

135/354

TMUFUEK01-P01

LEVEL

3

MAIN FUEL PUMP SYSTEM COMPONENTS - PRESSURE SWITCH

EFFECTIVITY

28-20-00Page 3

Apr 30/96

UFD4200

Page 129EFFECTIVITY

ALL


AIR RELEASE VALVE

IDENTIFICATIONFIN: 86QM, 87QM

LOCATION

ZONE: 540, 640



8/12/2019 28-FUEL

136/354


It allows air, but not fuel, to be expelled from the

pipeline and prevents air being sucked in.

TMUFUEK01-T02

LEVEL

3

EFFECTIVITY

28-20-00Page 4

Apr 30/96

UFD4200

Page 130EFFECTIVITY

ALL



8/12/2019 28-FUEL

137/354

TMUFUEK01-P02

LEVEL

3

MAIN FUEL PUMP SYSTEM COMPONENTS - AIR RELEASE VALVE

EFFECTIVITY

28-20-00Page 5

Apr 30/96

UFD4200

Page 131EFFECTIVITY

ALL


SEQUENCE VALVES

IDENTIFICATIONFIN: None

LOCATION

ZONE: 540, 640



8/12/2019 28-FUEL

138/354


The SEQUENCE VALVES are pressure relief valves attached

to secondary outlets on wing tank pumps only.

TMUFUEK01-T03

LEVEL

3

EFFECTIVITY

28-20-00Page 6

Apr 30/96

UFD4200

Page 132EFFECTIVITY

ALL

8/12/2019 28-FUEL

139/354


CENTER TANK FUEL PUMP

IDENTIFICATIONFIN: 37QA, 38QA

LOCATION

ZONE: 140




8/12/2019 28-FUEL

140/354


The pump delivers fuel at 11000 lb/hr (4989kg/hr) at

30 psi (2.08 bar). Thermal fuse: 200 degrees C.

The pump is installed in a canister containing a slidevalve so that the pump can be removed without having

to drain the tank.

TMUFUEK01-T

04

LEVEL

3

EFFECTIVITY

28-20-00Page 8

Apr 30/96

UFD4200

Page 134EFFECTIVITY

ALL



8/12/2019 28-FUEL

141/354

TMUFUEK01-P

04

LEVEL

3

MAIN FUEL PUMP SYSTEM COMPONENTS - CENTER TANK FUEL PUMP

EFFECTIVITY

28-20-00Page 9

Apr 30/96

UFD4200

Page 135EFFECTIVITY

ALL


CENTER TANK FUEL PUMP REMOVAL INFORMATION

IDENTIFICATIONFIN: 37QA, 38QA

LOCATION

ZONE: 140




8/12/2019 28-FUEL

142/354


PUMP REMOVAL:

- disconnect electrical connector

-remove attachment bolts

- use extractor screws in removal holes

- drain it

- turn the pump

- pull it out

TMUFUEK01-T

05

LEVEL

3

EFFECTIVITY

28-20-00Page 10

Apr 30/96

UFD4200

Page 136EFFECTIVITY

ALL



8/12/2019 28-FUEL

143/354

TMUFUEK01-P

05

LEVEL

3

MAIN FUEL PUMP SYSTEM COMPONENTS - CENTER TANK FUEL PUMP REMOVAL INFORMATION

EFFECTIVITY

28-20-00Page 11

Apr 30/96

UFD4200

Page 137EFFECTIVITY

ALL


WING TANK FUEL PUMP

IDENTIFICATIONFIN: 21QA, 25QA, 22QA, 26QA

LOCATION

ZONE: 540, 640




8/12/2019 28-FUEL

144/354

Sequence valve reduces pump outlet pressure to 25 psi.

The pump is installed in a canister containing a slide

valve so that the pump can be removed without havingto drain the tank.

TMUFUEK01-T

06

LEVEL

3

EFFECTIVITY

28-20-00Page 12

Apr 30/96

UFD4200

Page 138EFFECTIVITY

ALL



8/12/2019 28-FUEL

145/354

MAIN FUEL PUMP SYSTEM COMPONENTS - WING TANK FUEL PUMPTMUFUEK01-P

06

LEVEL

3

EFFECTIVITY

28-20-00Page 13

Apr 30/96

UFD4200

Page 139EFFECTIVITY

ALL


WING TANK FUEL PUMP REMOVAL INFORMATION

IDENTIFICATIONFIN: 21QA, 25QA, 22QA, 26QA

LOCATION

ZONE: 540, 640




8/12/2019 28-FUEL

146/354

PUMP REMOVAL:

- disconnect electricalconnector

-remove attachment bolts

- use extractor screws in removal holes

- drain it

- turn the pump

- pull it out

TMUFUEK01-T

07

LEVEL

3

EFFECTIVITY

28-20-00Page 14

Apr 30/96

UFD4200

Page 140EFFECTIVITY

ALL



8/12/2019 28-FUEL

147/354

MAIN FUEL PUMP SYSTEM COMPONENTS - WING TANK FUEL PUMP REMOVAL INFORMATIONTMUFUEK01-P

07

LEVEL

3

EFFECTIVITY

28-20-00Page 15

Apr 30/96

UFD4200

Page 141EFFECTIVITY

ALL


SCAVENGE JET PUMP

IDENTIFICATIONFIN: 66QM to 69QM, 89QM, 90QM

LOCATION

ZONE: 540, 640, 141, 142


The Jet pump has:



8/12/2019 28-FUEL

148/354

The Jet pump has:

- a venturi type passage

-a non-return valve

- ports for pipe connection

- an attachment plate with studs

TMUFUEK01-T08

LEVEL

3

EFFECTIVITY

28-20-00Page 16

Apr 30/96

UFD4200

Page 142EFFECTIVITY

ALL



8/12/2019 28-FUEL

149/354

MAIN FUEL PUMP SYSTEM COMPONENTS - SCAVENGE JET PUMPTMUFUEK01-P08

LEVEL

3

EFFECTIVITY

28-20-00Page 17

Apr 30/96

UFD4200

Page 143EFFECTIVITY

ALL


TRANSFER VALVE

IDENTIFICATIONFIN: 27QM, 28QM, 29QM, 30QM

LOCATION

ZONE: 540, 640


Each valve consists of a cast light alloy body housing



8/12/2019 28-FUEL

150/354

Each valve consists of a cast light alloy body housing

a spherical plug.

TMUFUEK01-T09

LEVEL

3

EFFECTIVITY

28-20-00Page 18

Apr 30/96

UFD4200

Page 144EFFECTIVITY

ALL



8/12/2019 28-FUEL

151/354

MAIN FUEL PUMP SYSTEM COMPONENTS - TRANSFER VALVETMUFUEK01-P09

LEVEL

3

EFFECTIVITY

28-20-00Page 19

Apr 30/96

UFD4200

Page 145EFFECTIVITY

ALL


TRANSFER VALVE DRIVE

IDENTIFICATIONFIN: 70QM, 71QM, 72QM, 73QM

LOCATION

28-fuel

Documents