Textron Cessna 172R User Manual

SECTION
7
AIRPLANE
&
SYSTEMS
DESCRIPTION
CESSNA
MODEL
172R
FUEL
VENTING
Fuel
system
venting
is
essential
to
system
operation.
Blockage
of
the
system
will
result
in
decreasing
fuel flow
and eventual
engine'-'
stoppage.
Venting
is
accomplished
by
an
interconnecting
line
from
the
right
fuel
tank
to
the
left
tank.
The
left
fuel
tank
is
vented
overboard
through
a
vent
line,
equipped
with
a
check
valve,
which
protrudes
from
the
bottom
surface of
the
left
wing
near
the
strut.
Both
fuel
filler
caps
are
also
vented.
REDUCED
TANK
CAPACITY
The
airplane
may
be
serviced
to
a
reduced
capacity
to
permit
heavier
cabin
loadings.
This is
accomplished
by
filling
each
tank
to
I
the
bottom
edge
of
the
fuel
filler
tab,
thus
giving
a
reduced
fuel
of
17.5
gallons
usable
in
each
tank.
FUEL
SELECTOR
VALVE
The
fuel
selector valve
should be
in
the
BOTH
position
for
takeoff,
climb,
landing,
and
maneuvers
that
involve
prolonged
slips
or
skids
of
more
than
30
seconds.
Operation
from
either
LEFT
or
RIGHT
tank is
reserved
for
cruising
flight.
_
in
cruising
flight,
unequal
fuel
flow
from
each
tank
may
occur
if
the
wings
are
not
maintained
exactly
level.
Resulting
wing
heaviness
can
be alleviated
gradually
by
turning
the
selector valve handle
to
the tank
in
the
"heavy"
wing.
It is
not
practical
to
measure
the time
required
to
consume
all
of
the
fuel
in
one
tank, and,
after
switching
to
the
opposite
tank,
expect
an
equal
duration
from
the
remaining
fuel.
The
airspace
in
both
fuel
tanks is
interconnected
by
a
vent
line
and,
therefore,
some
sloshing
of
fuel
between tanks
can
be
expected
when the tanks
are
nearly
full
and the
wings
are
not
level.
Feb
28/97
NOTE
When
the
fuel
selector
valve
handle
is
in
the
BOTH
position
All manuals and user guides at all-guides.com

Textron Cessna 172R Specifications

General

Brand	Textron
Model	Cessna 172R
Category	Aircrafts
Language	English