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>JETT NOZ ON L,
R
Advisory Fuel jettison nozzle valve open. Inhibited
when JETT NOZ ON message displayed.
>JETT NOZZLE
L, R
Advisory Jettison nozzle valve position disagrees
with commanded position.
Message Level Aural Condition
>SCAV PUMP ON Advisory Center wing tank scavenge pump
operating while airplane on the ground.
Message Level Aural Condition
>X FEED
CONFIG
Advisory Crossfeed valve 1 or 4 closed and main
tanks not equal, or crossfeed valve 2 or 3
closed and flaps not in takeoff position.
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
12.30.4 D6-30151-425
Fuel -
EICAS Messages
Intentionally
Blank
October 1, 2000
747 Operations Manual
Hydraulics Chapter 13
Table of Contents Section 0
Copyright © The Boeing Company. See title page for details.
D6-30151-425 13.TOC.0.1
Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.10.1
Hydraulic Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.10.1
Hydraulic SystemIndications. . . . . . . . . . . . . . . . . . . . . . . . . . . 13.10.3
Status Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.10.3
Hydraulic Synoptic Display. . . . . . . . . . . . . . . . . . . . . . . . . . 13.10.4
SystemDescription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.20.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.20.1
Hydraulic Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.20.1
Engine Driven Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.20.1
Demand Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.20.1
Auxiliary Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.20.1
Fluid Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.20.1
Load Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.20.2
Hydraulic SystemDiagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.20.3
Hydraulic Systems 1, 2, and 3 Diagram . . . . . . . . . . . . . . . . . . . 13.20.4
Hydraulic Systems Diagram4 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.20.5
EICASMessages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.30.1
Hydraulics EICASMessages . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.30.1
October 1, 2000
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
13.TOC.0.2 D6-30151-425
Hydraulics -
Table of Contents
Intentionally
Blank
October 1, 2000
747 Operations Manual
Hydraulics Chapter 13
Controls and Indicators Section 10
Copyright © The Boeing Company. See title page for details.
D6-30151-425 13.10.1
Hydraulic Panel
1 Hydraulic DEMAND Pump Selector
OFF – demand pump off.
AUTO -
• demand pump operates when related engine pump output pressure islow,
or when related fuel control switch is in CUTOFF
• demand pumps 1 & 4 also operate when flaps are in transit, or flaps out of
up in flight
ON - demand pump operates
Auxiliary (AUX) (System 4) -
• auxiliary pump operates on ground until related engine pump pressurizes
• related demand pump off
• does not trip OFF when EDP pressurizes system
2 ENGINE Hydraulic Pump Switch
ON – engine hydraulic pump pressurizes system when engine rotates.
3 Hydraulic System (SYS) Light
Illuminated (amber) –
• low hydraulic system pressure
• low hydraulic reservoir quantity
• excessive hydraulic fluid temperature
AUX
1
PRESS
ENGINE
ON
OFF
AUTO
ON
HYD
PUMPS
DEMAND
PRESS
SYS
FAULT
2
PRESS
ON
PRESS
SYS
FAULT
3
PRESS
ON
PRESS
SYS
FAULT
4
PRESS
ON
PRESS
SYS
FAULT
OFF
AUTO
ON OFF
AUTO
ON OFF
AUTO
ON
1
2 5
3
OVERHEAD PANEL
4
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
13.10.2 D6-30151-425
Hydraulics -
Controls and Indicators
4 Demand Pump Low PRESS Light
Illuminated (amber) –
• demand pump selector positioned to OFF orAUX
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