FlightSafety LEARJET 45 - INTRODUCTION; GENERAL

INTRODUCTION
The Learjet 45 fuel system consists of the fuel storage, quantity indicating, transfer, vent
system and single-point pressure refueling system.
The fuel system is covered in this chapter from the storage areas to the high-pressure engine
fuel pumps, at which point fuel system operation becomes a function of the powerplant.
The fuel system provides for fuel storage, fuel
transfer and low-pressure distribution to the
high pressure engine fuel pumps.
The fuel storage system consists of an integral
wet-wing tank in each wing, a fuselage tank
and a vent system.
Each wing tank contains four transfer jet
pumps (scavenge ejector pumps) which au-
tomatically move fuel to a section of the wing
tank, at the wing root, known as the collector
tank. A fifth transfer jet pump is located within
each wing in each fuselage tank transfer line,
outboard of the collector tanks. The function
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0
2
4
6
8
10
MAIN
FUEL
LBS X 100
L
F
1200
R
1650
LBS
FUEL
4480
1630
L FUEL PRESS LOW
R FUEL HEATER
DEFUEL OPEN
FUEL IMBALANCE
L FUEL QTY LOW
FUEL XFLO
R FWSOV CLSD
L FWSOV FAULT
L FUEL HEATER
R ENGFUEL FILTER
L FUEL QTY FAULT
FUEL XFLO OPEN
L STBY PUMP ON
R SCAV PUMP FAIL
END
FUEL
L STBY
R STBY
XFLOW
TOTALIZER RESET
ON
ARM
APR
EDS RECORD
ENG SYNC
N1
N2
OFF
L START
L IGN
OFF
ON
L ENG CMPTR
M
A
N
FIRE
#1 #2
EXTINGUISHER
L ENGINE
#1 #2
EXTINGUISHER
FIRE
R START
R IGN
OFF
ON
R ENG CMPTR
M
A
N
R ENGINE
ARMED ARMED ARMED ARMED
FIRE
PUSH
CLOSED
FIRE
PUSH
CLOSED
ON
ON
ONON
ON
1650
R W
IN
G
R EN
G
405
0
495
USED
1000
FUSELA
G
E
1400
L W
IN
G
L EN
G
LBS O
N
BO
A
RD
LEARJET 45 PILOT TRAINING MANUAL
FlightSafety
international
CHAPTER 5
FUEL SYSTEM
5-1
FOR TRAINING PURPOSES ONLY
GENERAL