Textron Cessna 172R - Fuel Drain Valves

SECTION
7
AIRPLANE
&
SYSTEMS
DESCRIPTION
CESSNA
MODEL
172R
NOTE
When
the
fuel
tanks
are
1/4 full
or
less,
prolonged
uncoordinated
flight
such
as
slips
or
skids
can uncover
the
fuel
tank
outlets.
Therefore,
if
operating
with
one
fuel
tank
dry
or
if
operating
on
LEFT
or
RIGHT
tank when
1/4
full
or
less,
do
not
allow
the
airplane
to
remain
in
uncoordinated
flight
for
periods
in
excess
of
30
seconds.
FUEL
DRAIN
VALVES
The
fuel
system
is
equipped
with
drain valves
to
provide
a
means
for
the
examination
of
fuel
in
the
system
for
contamination
and
grade.
The
system
should be
examined
before
each
flight
and
after
each
refueling,
by
using
the
sampler
cup
provided
to
drain
fuel from
|each
wing
tank
sump
and the
fuel
strainer
sump.
If
any
evidence
of
fuel
contamination
is
found,
it
must
be
eliminated
in
accordance
with the
Preflight
Inspection
checklist
and the
discussion
in
Section
8
of
this
publication.
If
takeoff
weight
limitations
for
the
next
flight
permit,
the
fuel
tanks
should
be
filled
after
each
flight
to
prevent
condensation.
7-28
Feb
28/00
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