• Author / Uploaded
• wagdi

Citation preview

 A380   TECHNICAL TRAINING MANUAL   MAINTENANCE COURSE - T1 & T2 (RR / Metric)   LEVEL I - ATA 29 Hydraulic Power 

This document must be used for training purposes 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 S.A.S.

A380 TECHNICAL TRAINING MANUAL

LEVEL I - ATA 29 HYDRAULIC POWER

L1W06161 - L0KT0T0

Hydraulic Power System Introduction (1) . . . . . . . . . . . . . . . . . . . . . . 2 Hydraulic Power System Presentation (1) . . . . . . . . . . . . . . . . . . . . . . 6 Hydraulic Power System Maintenance (1) . . . . . . . . . . . . . . . . . . . . . 16

MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

TABLE OF CONTENTS

Apr 21, 2006 Page 1

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM INTRODUCTION (1) General

L1W06161 - L0KT0T0 - LM29Z1000000001

The hydraulic power system comprises: - a main hydraulic power generation, - a backup hydraulic power generation supplied by electrical power, - an auxiliary hydraulic power generation.

MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM INTRODUCTION (1)

Apr 18, 2006 Page 2

L1W06161 - L0KT0T0 - LM29Z1000000001

A380 TECHNICAL TRAINING MANUAL

GENERAL MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM INTRODUCTION (1)

Apr 18, 2006 Page 3

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM INTRODUCTION (1) Architecture

L1W06161 - L0KT0T0 - LM29Z1000000001

In normal operation the two hydraulic circuits, green and yellow, are pressurized at 5000 PSI by engine pumps. These two hydraulic circuits supply the flight controls and landing gear system. As a backup local electro-hydraulic power generation is powered by electrical sources. They supply power for: - the flight controls through the Electro-Hydrostatic Actuators (EHA) and Electrical Backup Hydraulic Actuators (EBHA), - the braking and Nose Wheel Steering (NWS) system through Local Electro-hydraulic Generation Systems (LEHGS). Electric pumps supply auxiliary hydraulic power generation for maintenance operation and cargo door operation.

MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM INTRODUCTION (1)

Apr 18, 2006 Page 4

L1W06161 - L0KT0T0 - LM29Z1000000001

A380 TECHNICAL TRAINING MANUAL

ARCHITECTURE MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM INTRODUCTION (1)

Apr 18, 2006 Page 5

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM PRESENTATION (1) General

L1W06161 - L0KT0T0 - LM29P1000000001

The A380 hydraulic power is generated by two fully independent hydraulic circuits, green and yellow, which are normally pressurized at 5000 PSI. The two circuits operate simultaneously, with no fluid transfer between them. As a backup local electro-hydraulic generation is powered by electrical sources.

MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM PRESENTATION (1)

Apr 18, 2006 Page 6

L1W06161 - L0KT0T0 - LM29P1000000001

A380 TECHNICAL TRAINING MANUAL

GENERAL MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM PRESENTATION (1)

Apr 18, 2006 Page 7

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM PRESENTATION (1) Hydraulic power system architecture The hydraulic power system comprises: - main hydraulic power generation, - backup hydraulic power generation supplied by electrical power, - auxiliary hydraulic power generation.

Main Hydraulic Power Generation

L1W06161 - L0KT0T0 - LM29P1000000001

The green and yellow hydraulic circuits are fully independent. The hydraulic circuits are pressurized at 5000 PSI in normal operation by four Engine Driven Pumps (EDPs) in each circuit. Each circuit has a single hydraulic reservoir (RSVR). There are two EDPs per engine, each engine has one Fire Shut Off Valve (FSOV) to supply hydraulic fluid to both EDPs on that engine. The green and yellow circuits generate hydraulic power to operate: - the primary Flight Controls (F/CTL), - the secondary flight controls, - the landing gear, - the braking and steering system.

MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM PRESENTATION (1)

Apr 18, 2006 Page 8

L1W06161 - L0KT0T0 - LM29P1000000001

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM ARCHITECTURE - MAIN HYDRAULIC POWER GENERATION MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM PRESENTATION (1)

Apr 18, 2006 Page 9

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM PRESENTATION (1) Hydraulic power system architecture (continued) Backup Hydraulic Power Generation

L1W06161 - L0KT0T0 - LM29P1000000001

As a back-up to the normal hydraulic circuits, hydraulic pressure can be locally produced for the flight controls and landing gear using local electro-hydraulic power generators. The local electro-hydraulic generation system comprises: - EHA (Electro-Hydrostatic Actuator) and EBHA (Electrical Backup Hydraulic Actuator) to operate primary flight controls, - LEHGS (Local Electro-Hydraulic Generation System) to operate braking and steering systems.

MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM PRESENTATION (1)

Apr 18, 2006 Page 10

L1W06161 - L0KT0T0 - LM29P1000000001

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM ARCHITECTURE - BACKUP HYDRAULIC POWER GENERATION MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM PRESENTATION (1)

Apr 18, 2006 Page 11

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM PRESENTATION (1) Hydraulic power system architecture (continued) Auxiliary Hydraulic Power Generation

L1W06161 - L0KT0T0 - LM29P1000000001

On the ground, with all engines shut down, each hydraulic circuit can be pressurized by two Electric Motor Pumps (EMPs). For the cargo doors operation, one of the EMPs in the green system operates to generate hydraulic power. An isolation valve closes to isolate the main hydraulic users from the cargo doors hydraulic circuit. A similar isolation valve is fitted to the yellow circuit for the body gear steering system (not shown) which can be pressurized by the yellow EMPs. A manually operated backup auxiliary hydraulic pump can be used to operate the cargo doors. Hydraulic pressure can also be supplied to the green and yellow circuits via ground connections.

MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM PRESENTATION (1)

Apr 18, 2006 Page 12

L1W06161 - L0KT0T0 - LM29P1000000001

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM ARCHITECTURE - AUXILIARY HYDRAULIC POWER GENERATION MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM PRESENTATION (1)

Apr 18, 2006 Page 13

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM PRESENTATION (1) Control And Indicating Each hydraulic circuit reservoir supplies their respective EDPs through the FSOV that isolates the engine from the hydraulic circuit in case of fire.The valves are controlled by fire handles located on the cockpit overhead engine FIRE panel. Each EDP can be controlled ON or OFF through its respective P/BSW located on the HYDraulic cockpit control panel. Both EDPs on each engine can be declutched through a P/BSW located on the cockpit hydraulic control panel. On ground for maintenance operation, each EMP can be controlled ON or OFF through its respective P/BSW located on the GrouND HYDraulic maintenance cockpit panel.

Monitoring

L1W06161 - L0KT0T0 - LM29P1000000001

Two Hydraulic System Monitoring Units (HSMUs), one for each hydraulic circuit, control and monitor the green and yellow hydraulic circuits respectively. They also give indication on the Control and Display System (CDS).

MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM PRESENTATION (1)

Apr 18, 2006 Page 14

L1W06161 - L0KT0T0 - LM29P1000000001

A380 TECHNICAL TRAINING MANUAL

CONTROL AND INDICATING - MONITORING MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM PRESENTATION (1)

Apr 18, 2006 Page 15

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM MAINTENANCE (1)

L1W06161 - L0KT0T0 - LM29P2MAINT0001

Hydraulic Power System Safety Items When you work on the hydraulic power system, make sure that you obey all the AMM safety precautions. This will prevent injury to persons and/or damage to the aircraft. Here is an overview of main safety precautions relative to the hydraulic power system. As the green and yellow hydraulic systems are similar, the diagrams refer to only one hydraulic power system, the yellow system. Pay attention to the status of the hydraulic power system and its users in case they are pressurized. Make sure that all the safety devices and all the warning notices are in position, before any maintenance operations are performed. When disconnecting any Hydraulic line and component, all pumps must be switched off and the hydraulic reservoir must be depressurized to prevent fluid loss and personal injury. When opening the manual depressurization valve of the reservoirs protect your hands and face from the gas, as there could be a risk of: - Burns from hot pressurized gas, - Contamination from hydraulic fluid contained in the gas. Suitable protective clothing must be worn when working with hydraulic fluid, such as rubber gloves and safety goggles. Do not get hydraulic fluid on your skin, in your eyes or in your mouth. Hydraulic fluid is poisonous and can go through your skin and into your body. The Local Electro-Hydraulic Generation System (LEHGS) weighs approximately 120 pounds. If incorrect procedures are used during removal or installation, injury to persons, or damage to the LEHGS can occur. By consequence, the LEHGS removal/installation tasks require specific tooling that must be used.

MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM MAINTENANCE (1)

Apr 18, 2006 Page 16

L1W06161 - L0KT0T0 - LM29P2MAINT0001

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM SAFETY ITEMS MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM MAINTENANCE (1)

Apr 18, 2006 Page 17

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM MAINTENANCE (1) Hydraulic Power System Ground Support Equipment

L1W06161 - L0KT0T0 - LM29P2MAINT0001

Some hydraulic power system maintenance tasks require Ground Support Equipment (GSE). As an example, during the LEHGS Removal/Installation, a specific GSE is used to hold this heavy component. Refer to the Aircraft Maintenance Manual (AMM) for the tasks. Also, refer to the illustrated Tool and Equipment Manual (TEM) for the complete list of the tools.

MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM MAINTENANCE (1)

Apr 18, 2006 Page 18

L1W06161 - L0KT0T0 - LM29P2MAINT0001

A380 TECHNICAL TRAINING MANUAL

HYDRAULIC POWER SYSTEM GROUND SUPPORT EQUIPMENT MAINTENANCE COURSE - T1 & T2 (RR / Metric)  LEVEL I - ATA 29 Hydraulic Power

HYDRAULIC POWER SYSTEM MAINTENANCE (1)

Apr 18, 2006 Page 19

AIRBUS S.A.S. 31707 BLAGNAC cedex, FRANCE STM REFERENCE L1W06161 APRIL 2006 PRINTED IN FRANCE AIRBUS S.A.S. 2006 ALL RIGHTS RESERVED AN EADS JOINT COMPANY WITH BAE SYSTEMS