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In flight, when the FUEL JETTISON ARM switch is armed and either fuel jettison
NOZZLE switch is pushed ON, the defuel/isolation valves and jettison nozzle
valves open. The fuel system automatically operates main tank boost pumps and
center tank override/jettison pumps as required to jettison fuel based on the
selected TO REMAIN quantity.
The nozzles cannot open on the ground, regardless of switch positions.
In flight, jettison time is displayed in minutes on the fuel synoptic when the
jettison arm switch is positioned on while in the air. Jettison automatically stops
when a value just above the FUEL TO REMAIN quantity is reached. The system
shuts off the main tank jettison pumps and closes the center tank jettison isolation
valves.
At least (TBD) pounds of fuel remains in each main tank after jettison is complete.
787 Flight Crew Operations Manual
Fuel -
System Description
Boeing Proprietary 12.20.7
Fuel Jettison Schematic
FUEL
TOTAL
LBS X 1000
L NOZZLE R NOZZLE
MIN FUEL TEMP
MIN
MLW
JETT TIME
TO REMAIN 25.0
FUEL TEMP +13c 30
-37c
215.3
33.1
AFT AFT
FWD
33.2
149.0
CENTER
CROSSFEED
R
R MAIN
FWD
L MAIN
L
ON ON
FUEL TO
REMAIN
PULL ON
FUEL JETTISON
L NOZZLE R ARM
ARMED
Fuel jettison
nozzle valve
Center tank fuel jettison
isolation valve
VALVE VALVE FAULT
Main tank
defuel/isolation valve
787 Flight Crew Operations Manual
Fuel -
System Description
12.20.8 Boeing Proprietary
Fuel Nitrogen Generation System
The Nitrogen Generation System (NGS) provides automatic full time
flammability protection for the fuel system. It generates nitrogen enriched air to
displace fuel vapors in all fuel tanks. The nitrogen enriched air minimizes fuel
flammability during normal flight and ground operations.
787 Flight Crew Operations Manual
Fuel Chapter 12
EICAS Messages Section 30
Boeing Proprietary 12.30.1
12.30 Fuel-EICAS Messages Fuel System FMS CDU Messages
The CDU can display the following messages.
INSUFFICIENT FUEL – Predicted fuel at destination is less than the FMC pilot–
entered or uplinked reserves.
Fuel System EICAS Messages
The following EICAS messages can be displayed.
Message Level Aural Condition
FUEL AUTO
JETTISON
Caution Beeper Total fuel quantity is less than selected TO
REMAIN quantity and a nozzle valve is
open.
FUEL BALANCE
SYS
Advisory Fuel balance system is inoperative.
FUEL
CROSSFEED
Advisory Crossfeed valve is not in the commanded
position.
FUEL DISAGREE Advisory Totalizer fuel quantity and FMC calculated
fuel quantity disagree.
FUEL
IMBALANCE
Advisory Fuel imbalance between the main tanks is
excessive.
FUEL IN CENTER Advisory Both center fuel pump switches are OFF
with fuel in the center tank
FUEL JETT
NOZZLE L, R
Advisory Jettison nozzle valve in not in the
commanded position.
FUEL JETTISON
SYS
Caution Beeper Fuel jettison system is inoperative.
FUEL LOW
CENTER
Advisory Center tank is empty and one or both center
fuel pump switches are ON.
FUEL PRESS
ENG L, R
Caution Beeper Engine is on suction feed.
FUEL PRESS
ENG L+R
Advisory All fuel pump output pressures are low.
FUEL PUMP
CENTER L, R
Advisory Center fuel pump output pressure is low.
787 Flight Crew Operations Manual
Fuel -
EICAS Messages
12.30.2 Boeing Proprietary
FUEL PUMP CTR
L+ R
Advisory Both center fuel pump output pressures are
low.
FUEL PUMP L
AFT, FWD
Advisory Left aft or forward fuel pump output
pressure is low.
FUEL PUMP R
AFT, FWD
Advisory Right aft or forward fuel pump output
pressure is low.
FUEL QTY LOW Caution Beeper Fuel quantity is low in either main tank.
FUEL TEMP
HIGH
Advisory Fuel temperature is approaching maximum.
FUEL TEMP LOW Advisory Fuel temperature is approaching minimum.
FUEL VALVE
APU
Advisory APU fuel valve is not in the commanded
position.
Message Level Aural Condition
787 Flight Crew Operations Manual
Hydraulics Chapter 13
Table of Contents Section 0
Boeing Proprietary 13.TOC.0.1
1C3o.0n Htyrdoralusl iacsn-Tda bIlne odf iCcoanttoenrtss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.10.1
Hydraulic Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.10.1
Hydraulic System Indications . . . . . . . . . . . . . . . . . . . . . . . . . . 13.10.2
　
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