Leerjet 35/36 Developed for Training Purposes 4F-7
October 2001
Fuel System
Fuel filtration is accomplished by in-line filters that are
equipped with either paper or metal elements designed to allow
fuel bypass in the event that the filters should become clogged.
Fuel filter bypass will be indicated by a single amber fuel filter
annunciator light.
Fuel jettison is achieved through an electrically operated con-
trol valve in the aft end of each tip tank. Setting the guarded
FUEL JTSN switch to ON opens the valves and permits fuel to
gravity flow from each tip tank. Only the tip tank contents can
be jettisoned; approximately 5 minutes are required to jettison
full tip tanks.
Control/Indicating System
The fuel control panel installed in the center pedestal provides
the pilot with control and management of the fuel system; lights
and annunciators are provided for verification of system opera-
tion. Nine fuel probes supply information to the fuel quantity
indicator through the six-position fuel quantity selector switch.
Fuel quantity is compensated for by fuel temperature and indi-
cates most accurately in the TOTAL position. A red LOW
FUELannunciator illuminates when a float switch senses the
fuel level in either wing is below 400 to 500 lbs.
A transfer and crossflow system provides movement of fuel
between the wing tanks and the fuselage tanks. A wing fuel
imbalance may be corrected by opening the crossflow valve
and turning on the standby pump in the heavy wing.
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