Vol. 1 14--00--1
REV 56, Jan 31/03
HYDRAULIC POWER
Table of Contents
Flight Crew Operating Manual
CSP A--013
MASTER
CHAPTER 14 -- HYDRAULIC POWER
Page
TABLE OF CONTENTS 14--00
Table of Contents 14--00--1
INTRODUCTION 14--10
Introduction 14--10--1
SYSTEMS 1 AND 2 14--20
Hydraulic Systems No.1 and No.2 14--20--1
Engine Driven Pumps 14--20--4
AC Motor Pumps (ACMP) 14--20--4
Hydraulic Shutoff Valves 14--20--5
Reservoir 14--20--5
Accumulator 14--20--5
System Circuit Breakers 14--20--8
SYSTEM 3 14--30
Hydraulic System No.3 14--30--1
AC Motor Pumps 14--30--3
System Circuit Breakers 14--30--6
LIST OF ILLUSTRATIONS
INTRODUCTION
Figure 14--10--1 Hydraulic Systems Diagram 14--10--2
Figure 14--10--2 Hydraulic Systems Overview 14--10--3
SYSTEMS 1 AND 2
Figure 14--20--1 Hydraulic Systems 1 and 2 Schematic 14--20--2
Figure 14--20--2 Hydraulic Control Panel 14--20--4
Figure 14--20--3 Systems 1 and 2 -- Synoptic Page 14--20--6
Figure 14--20--4 Systems 1 and 2 -- EICAS Indications 14--20--7
SYSTEM 3
Figure 14--30--1 Hydraulic System 3 -- Schematic 14--30--2
Figure 14--30--2 Hydraulic Control Panel 14--30--3
Figure 14--30--3 System 3 -- Synoptic Page 14--30--4
Figure 14--30--4 System 3 -- EICAS Indications 14--30--5
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HYDRAULIC POWER
Introduction
Flight Crew Operating Manual
CSP A--013
MASTER
1. INTRODUCTION
Hydraulic power is provided by three independent systems designated No.1, No.2 and No.3.
All systems operate at a nominal pressure of 3000 psi (20,685 kPa) and use synthetic
hydraulic fluid “Skydrol”.
WARNING
Skydrol is highly corrosive and can produce severe
skin and eye irritation.
Systems 1 and 2 are serviced by ground service panels located in the aft equipment
compartment. System 3 is serviced by a ground service panel located on the right side of
the fuselage, aft of the wing root.
Each system has two hydraulic pumps; a main pump (A) for normal power and a backup
pump (B) for supplementary power. System No.1 and 2 main pumps are engine driven
pumps (EDP’s). System 1 EDP (1A) is driven by the left engine and system 2 EDP (2A) is
driven by the right engine. System 1 and 2 backup pumps (1B and 2B) are electrical AC
motor pumps (ACMP’s). Both hydraulic pumps for system No.3 are ACMP’s. In system
No.3, the main pump (3A) normally runs continuously, while the backup pump (3B) is
available during periods of high flow requirements.
The hydraulic systems supply power to operate the rudder, elevators, ailerons, spoilerons,
flight spoilers, ground spoilers, wheel brakes, nosewheel steering and landing gear
extension and retraction. The rudder, elevators and ailerons are powered by more than one
hydraulic system to prevent loss of critical flight controls.
During a total AC power failure in flight, pump 3B will be automatically powered by the air
driven generator (ADG) when it is deployed. This will provide hydraulic pressure to the
landing gear, brakes and nosewheel steering and also provides backup hydraulic pressure
to the primary flight controls.
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Introduction
Flight Crew Operating Manual MASTER
CSP A--013
Hydraulic Systems Diagram
Figure 14---10---1
LEFT SPOILERON
RUDDER
LEFT AND RIGHT
ELEVATORS
NO. 1 SYSTEM
AC MOTOR
PUMP (1B)
ENGINE
DRIVEN
PUMP (1A)
LEFT AND RIGHT
OUTBOARD
GROUND SPOILERS
LEFT AND RIGHT
AILERON
RUDDER
LEFT AND RIGHT
ELEVATORS
LEFT AND RIGHT
INBOARD BRAKES
MAIN AND NOSE
LANDING GEAR
NOSEWHEEL
STEERING
RIGHT AILERON
RUDDER
LEFT AND RIGHT
ELEVATORS
LEFT AND RIGHT
FLIGHT
SPOILERS
MLG DOWNLOCK
ASSIST
ACTUATORS
LEFT AND RIGHT
INBOARD GROUND
SPOILERS
LEFT AND RIGHT
OUTBOARD BRAKES
NO. 3 SYSTEM
AC MOTOR
PUMP (3B)
NO. 2 SYSTEM
AC MOTOR
PUMP (2B)
ENGINE
DRIVEN
PUMP (2A)
AC MOTOR
PUMP (3A)
LEFT AILERON
LEFT AND RIGHT
FLIGHT SPOILERS
LEFT AND RIGHT
SPOILERONS
RIGHT SPOILERON
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HYDRAULIC POWER
Introduction
Flight Crew Operating Manual
CSP A--013
　
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