Fuel Contamination - Cessna 172R Operating Handbook

SECTION 8
HANDLING, SERVICE & MAINTENANCE

FUEL CONTAMINATION

Fuel contamination is usually the result of foreign material
in the fuel
present
microbes or bacterial growth. In addition, additives that are
compatible with fuel or fuel
to become contaminated.
Before each flight and after each refueling, use a clear sampler
cup and drain at least a cupful of fuel from each fuel tank drain
location and from the fuel strainer quick drain valve to determine if
contaminants are
fueled with the proper grade
|
If contamination is detected, drain all fuel drain points again,
including the fuel reservoir and fuel selector quick drain valves and
then gently rock the wings and lower the tail to the ground to move
any additional contaminants to the sampling points. Take repeated
|samples
from all fuel drain points until all contamination has been
removed. If,
the airplane should not be flown. Tanks should be drained
exists,
and system purged by
evidence of contamination
the airplane has
completely and refuel with the correct grade. Do
with contaminated or unapproved
In addition, Owners/Operators who are
particular fixed base
has been checked for contamination and is properly filtered before
allowing the airplane
between flights, provided weight and balance considerations will
permit, to reduce the possibility of
partially filled tanks.
To further reduce the possibility of contaminated
maintenance of the fuel
with the airplane Maintenance Manual. Only the proper
recommended in this handbook, should be used, and fuel additives
be used unless approved by Cessna and the Federal
should
not
Aviation Administration.
8-20
system, and may consist of water, rust, sand, dirt,
present,
after repeated sampling, evidence
must
been serviced with
operator
be serviced. Fuel tanks should be kept full
to
system should be performed
system components
ensure the
and
to
of fuel.
qualified maintenance personnel.
be removed before further
the improper fuel
fuel.
should be assured that the fuel supply
water condensing
CESSNA
MODEL 172R
can cause the fuel
has been
airplane
of contamination still
grade, defuel
fly the airplane
not
not acquainted with a
on the walls of
fuel, routine
in accordance
Revision 8
-
not
All
flight. If
fuel, as