FUEL QUANTITY
INDICATING SYSTEM
GENERAL
The aircraft is equipped with a fuel quantity
signal conditioner (FQSC) located in the tail-
cone equipment bay. This unit is a two chan-
nel fuel quantity computer microprocessor
based component responsible for interfacing
with fuel quantity probes, fuel density com-
pensator probes and the single-point refuel
control panel. The left channel provides
TOTAL and LEFT WING fuel quantity to the
EICAS and the right channel provides FUSE-
LAGE and RIGHT WING quantity to the
EICAS. If either channel fails, the corre-
sponding wing quantity indication and total
fuel quantity indication will show invalid
(amber dashes).
One channel of the fuel quantity computer is
provided with DC electrical power through
the L QTY circuit breaker in the left FUEL
group of circuit breakers and the other chan-
nel through the R QTY circuit breaker in the
right FUEL group of circuit breakers.
LEARJET 45 PILOT TRAINING MANUAL
FlightSafety
international
5-5
FOR TRAINING PURPOSES ONLY
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