A319/A320/A321
TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE
36 PNEUMATIC SYSTEM
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.
System Presentation (1) .......................... 1
System Controls Presentation (1)................. 7
ECAM Page Presentation (1) ...................... 11
** Engine Bleed System Description (3) ......... 15
Pneumatic System Warnings (3) ................... 21
APU Bleed Air SPLY/X-Bleed System (3) .......... 25
** BMC Interfaces (3)............................ 29
** Pneumatic Leak Detection System D/O (3) ..... 35
Engine Bleed Air Supply Components (3) ......... 45
** GND & APU Bleed Air Supply Components (3)... 59
Leak Detection Components (3) ................... 73
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 36 PNEUMATIC SYSTEM
UF94200
EFFECTIVITY
ALL
36 PNEUMATIC SYSTEM
UF94200 TABLE OF CONTENTS Page
36 CONTENTS
Page i
Dec 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 36 PNEUMATIC SYSTEM
UF94200
EFFECTIVITY
ALL
36 PNEUMATIC SYSTEM
UF94200 TABLE OF CONTENTS Page
36 CONTENTS
Page ii
Dec 31/00
THIS PAGE INTENTIONALLY LEFT BLANK
36 - PNEUMATIC
36-00-00 SYSTEM PRESENTATION
CONTENTS:
Sources
Engine Bleed Air Supply
Engine Bleed Valve
Overpressure Valve
Precooler
APU Bleed
Ground Air Supply
Cross Bleed Valve
Leak detection
Monitoring
Users
Self Examination
TMUPNE201 LEVEL 1
EFFECTIVITY 36-00-00 Page 1
May 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 36 PNEUMATIC SYSTEM
UF94200
EFFECTIVITY Page 1
ALL
SYSTEM PRESENTATION
SOURCES
The Bleed Air system can be supplied by four different
sources: the engines, the APU and ground cart.
APU bleed air supply has priority over engine bleed
air supply.
On ground, the system may be supplied by a ground cart.
ENGINE BLEED AIR SUPPLY
The engine bleed air system is supplied by one of the
two different engine compressor stages: the
Intermediate Pressure stage or the High Pressure stage.
The Intermediate Pressure (IP) stage is normally used.
When the IP pressure is too low (low engine speed),
the HP valve pneumatically opens and regulates at 36
psi.
The valve is used to connect the HP stage to the engine
bleed air system.
Note: This valve is springloaded closed in the absence
of upstream pressure.
ENGINE BLEED VALVE
The HP or IP air passes through the engine bleed valve
which operates as a pressure regulating and shut-off
valve.
The Engine Bleed Valve operates pneumatically and
regulates the downstream pressure to 44 psi. It is
springloaded closed in the absence of upstream
pressure.
Note: The closure of the Engine Bleed Valve causes the
HP valve to close.
OVERPRESSURE VALVE
The overpressure valve is positioned downstream of the
engine bleed valve to protect the system.
The Overpressure valve is pneumatically operated and
springloaded open.
PRECOOLER
The precooler is a heat exchanger downstream of the
engine bleed valve, used to cool the bleed air. A fan
air valve regulates the cold air flow to the precooler
for bleed air temperature control.
The Fan Air Valve allows the bleed air temperature to
be maintained at 200ºC. It is springloaded closed in
the absence of air pressure.
APU BLEED
The APU bleed air passes through the APU bleed valve
which is pneumatically operated and electrically
controlled (GARRET) or fuel operated and electrically
controlled (APIC).
When open, the APU bleed valve has priority over the
engine bleed valves, which are automatically
controlled to close.
Note: The APU valve is springloaded closed in the
absence of air pressure (GARRET) or fuel pressure
(APIC).
GROUND AIR SUPPLY
The bleed air system can be supplied by the ground
cart.
TMUPNE201-T01 LEVEL 1
EFFECTIVITY 36-00-00 Page 2
May 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 36 PNEUMATIC SYSTEM
UF94200
EFFECTIVITY Page 2
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