A319/A320/A321
TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE
29 HYDRAULIC POWER
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 (1)............................ 7
** Hydraulic System Users (1) ................... 11
** Circuit Identification and Routing (2) ...... 15
** ECAM Page Presentation (1) ................... 25
** Hydraulic System Warnings (3)................ 33
** Green Hydraulic System D/O (3)............... 37
** Blue Hydraulic System D/O (3)................ 45
** Yellow Hydraulic Syst D/O (3)................ 53
** Leak Measurement System Presentation (3).... 63
** Hyd. Reservoir Pressurizing Syst D/O (3).... 69
** Hyd. Reservoir Filling Presentation (2) ..... 75
** Seal Drain System Presentation (2) .......... 79
** Green System Components (3) .................. 87
** Blue System Components (3) .................. 119
** Yellow System Components (3)................ 151
** Hyd Reservoir PRESS Syst Components (3).... 185
** Power Transfer Unit Components (3) ......... 193
MAINTENANCE PRACTICES
** Reservoir Depressurization (2) ............. 201
** Reservoir Filling (2) ....................... 205
** RAT Stowage and Servicing (2)............... 209
** RAT Test (3) ................................. 215
HYD Leakage (3) ................................. 219
SPECIFIC PAGES
** CFDS Specific Page Presentation (3) ...... 221
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 29 HYDRAULIC POWER
UF94200
EFFECTIVITY
ALL
29 HYDRAULIC POWER
UF94200 TABLE OF CONTENTS Page
29 CONTENTS
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 29 HYDRAULIC POWER
UF94200
EFFECTIVITY
ALL
29 HYDRAULIC POWER
UF94200 TABLE OF CONTENTS Page
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Page ii
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29 - HYDRAULIC SYSTEM
29-00-00 SYSTEM PRESENTATION
CONTENTS:
General
Reservoirs
Fire Shut-off Valves
Engine Driven Pumps
Electric Pumps
Hand Pump
Ram Air Turbine
Accumulators
Power Transfer Unit
Self Examination
TMUHYD201 LEVEL 1
EFFECTIVITY 29-00-00 Page 1
Mar 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 29 HYDRAULIC POWER
UF94200
EFFECTIVITY Page 1
ALL
SYSTEM PRESENTATION
GENERAL
There are three independent hydraulic systems : Green,
Blue and Yellow.
In normal operation, the green and yellow hydraulic
systems are powered by Engine Driven Pumps (EDPs), and
the blue hydraulic system by an electric pump.
Auxiliary power is provided by an electric pump in the
yellow system.
A bidirectional Power Transfer Unit (PTU) enables the
green system to be powered by the yellow system or
vice versa, without fluid transfer.
A Ram Air Turbine (RAT) is provided in the blue system
for emergency use.
A hand pump is provided in the yellow system for cargo
door manual operation.
RESERVOIRS
Each hydraulic system has its own reservoir.
It supplies hydraulic fluid to the system pumps, and
is pneumatically pressurized.
The green reservoir is located in the main landing
gear bay, the yellow reservoir in the yellow hydraulic
compartment and the blue reservoir above the blue
ground service panel.
All the reservoirs are filled from the green ground
service panel.
FIRE SHUT-OFF VALVES
On the green and yellow systems, a fire shut-off valve
is positioned upstream of the engine driven pump to
isolate the system.
They are operated by their respective engine fire
pushbutton switches to isolate the engine driven pump
in case of engine fire.
ENGINE DRIVEN PUMPS
The green and yellow systems are each pressurized by
a pump driven respectively by engine 1 and engine 2.
Engine Driven Pumps (EDPs) are located on the accessory
gearbox of each engine. They are of the variable
displacement type.
Normal system operating pressure is 3000 psi
(206 bars).
ELECTRIC PUMPS
The blue system is pressurized by an electric pump.
An electric pump allows the yellow system to be
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