Learjet 60 - FUEL PRESS Lights; FUEL Syslight; LOW FUEL Light

Pilot's
Manual
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Learjet 60
FUEL SYSTEM
GLARESHIELD LIGHTS
FUEL PRESS LIGHTS
The red LFUEL
PRESS and RFUEL PRESS warning
lights in the
glareshield annunciator
panel are installed to alert the
pilot
of
a low
fuel
pressure condition .
The FUEL PRESS lights are energized
by a
pressure switch installed
in each engine fuel supply line
between the
aircraft fuel
filter and the engine-driven
fuel pump . When fuel supply
pressure
drops to 2 .75 psi or
below, the pressure switch closes to illu-
minate
the respective light . At 3
.75 psi, the switch will reopen . Should
the
light illuminate, the standby
pumps should be used to supply
en-
gine
fuel . The fuel control
panel incorporates two LOFUEL
PRESS
lights which illuminate
in conjunction with the associated
glareshield
warning
light .
LOW FUEL
LIGHT
The amber LOW FUEL
caution light in the glareshield
annunciator
panel will illuminate
when the fuel quantity in either wing tank
de-
creases to approximately
410 pounds (186 kilograms) of fuel
with the
aircraft in a level attitude .
The light is operated by a low wing
fuel
float
switch installed in each
wing tank . Either float switch may cause
the light to illuminate .
FUEL SYS LIGHT
The green FUEL SYS light in the
glareshield annunciator panel will il-
luminate whenever a fuel
transfer function is selected on the fuel con-
trol panel .
The following conditions
cause the light to illuminate :
" Crossflow valve is
fully opened
" Either transfer valve (left
or right) is open
" NORM, AUX, or GRVTY
XFR is selected
" FILL is selected
" Either standby pump is on
The following conditions
cause the light to flash :
" The fuselage EMPTY light is
illuminated
" The fuselage FULL light
is illuminated
2-36
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PM-123
Change 3