SECTION 4
NORMAL
PROCEDURES
CESSNA
MODEL 172R
AMPLIFIED
PROCEDURES
PREFLIGHT INSPECTION
The
Preflight Inspection,
described
in Figure 4-1 and adjacent
checklist,
is
required prior
to
each flight.
If
the
airplane has been in
extended
storage,
has had
recent
major
maintenance,
or
has been
operated from marginal airports, a
more
extensive
exterior
inspection is recommended.
After major
maintenance has
been performed,
the
flight and trim
tab controls should be
double
checked
for
free and
correct
movement
and security.
The
security of
all
inspection plates
on
the
airplane
should
be checked following
periodic inspections. If
the
airplane
has been
waxed
or
polished, check the
external
static
pressure
source
hole for
stoppage.
If the
airplane
has been
exposed
to
much ground
handling in a
crowded
hangar, it
should
be checked for dents and
scratches on
|wings,
fuselage,
and
tail
surfaces,
damage
to
navigation
and anti¬
collision lights, damage
to
nose
wheel
as a
result
of exceeding
tow
limits, and
avionics
antennas.
Outside
storage
for long periods may
result
in dust
and
dirt
accumulation on
the
induction
air
filter,
obstructions in airspeed
system
lines,
water
contaminants
in
fuel
tanks
and
insect/bird/rodent
nests
in any
opening.
If any
water
is
detected
in
the
fuel
system,
the fuel tank sump quick
drain
valves,
fuel reservoir
quick drain
valve,
and
fuel
strainer quick drain
valve
should all
be
thoroughly
drained
again. Then,
the
wings
should
be gently rocked
and
the tail
lowered
to
the ground
to
move
any further
contaminants
to
the sampling points. Repeated samples
should
then be
taken
at
all
quick drain points until
all
contamination
has
been
removed.
If,
after repeated sampling, evidence of
contamination
still exists, the
fuel
tanks should be completely drained and the fuel
system
cleaned.
Additionally,
if
the
airplane has been stored outside in windy
or
gusty
areas,
or
tied down adjacent
to
taxiing
airplanes, special
attention
should be paid
to
control surface
stops,
hinges,
and
brackets
to
detect the presence of potential wind damage.
4-18
Revision
4
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