Textron Cessna 172R User Manual

CESSNA
MODEL
172R
SECTION
7
AIRPLANE
&
SYSTEMS
DESCRIPTION
FUEL
INDICATING
Fuel
quantity
is
measured
by
two
float
type
fuel
quantity
\
transmitters
(one
in
each
tank)
and
indicated
by
an
electrically
operated
fuel
quantity
indicator
on
the
left
side
of
the
instrument
panel.
The
gauges
are
marked
in
gallons
of fuel.
An
empty
tank
is
indicated
by
a
red
line
and the
number
0.
When
an
indicator
shows
an
empty
tank,
approximately
1.5
gallons
remain
in
each
tank
as
/iSP,N'
unusable
fuel.
The
indicators
should
not
be
relied
upon
for
accurate
'
readings
during
skids,
slips,
or
unusual
attitudes.
Each
fuel
tank
also
incorporates
warning
circuits
which
can
detect
low
fuel
conditions
and
erroneous
transmitter
messages.
Anytime
fuel
in
the
tank
drops
below
approximately
5
gallons
(and
r
remains below this level
for
more
than
60
seconds),
the
amber
LOW
FUEL
message
will
flash
on
the
annunciator
panel
for
approximately
10
seconds and
then remain
steady
amber. The
annunciator
cannot
be
turned
off
by
the
pilot.
If
the
left
tank is
low,
the
message
will
read
L
LOW
FUEL.
If
the
right
tank is
low,
the
message
will
read
LOW
FUEL
R.
If
both
tanks
are
low,
the
\
message
will
read
L
LOW
FUEL
R.
In
addition
to
low
fuel
annunciation,
the
warning
circuitry
is
r
designed
to
report
failures
with
each transmitter
caused
by
shorts,
opens
or
transmitter
resistance which
increases
over
time.
If
the
circuitry
detects
any
one
of
these
conditions,
the
fuel
level
indicator
needle
will
go
to
the
OFF
position
(below
the
0
mark
on
the
fuel
indicator),
and the amber
annunciator
will
illuminate.
If
the
left
tank|
transmitter
has
failed,
the
message
will
read
L
LOW
FUEL
If
the
r
right
tank transmitter
has
failed,
the
message
will
read
LOW
FUEL
R.
If
both
tanks
transmitters have
failed,
the
message
will
read
L
LOW
FUEL
R.
Fuel
pressure
is
measured
by
use
of
a
transducer
mounted
near
the
fuel
manifold.
This
transducer
produces
an
electrical
signal
which
is
translated
for
the
cockpit-mounted
indicator
in
gallons-per-
hour.
Feb
28/00
7-25
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Textron Cessna 172R Specifications

General

Brand	Textron
Model	Cessna 172R
Category	Aircrafts
Language	English