Fuel Contamination - Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual

CESSNA SECTION 8
MODEL 208B 867 SHP AIRPLANE HANDLING, SERVICE
GARMIN G1000 AND MAINTENANCE
FUEL
(Continued)

FUEL CONTAMINATION

Fuel contamination is usually the result of foreign material present in
the fuel system and may consist of water, rust, sand, dirt, microbes, or
bacterial growth. In addition, additives that are not compatible with fuel
or fuel system components can cause the 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 inboard fuel tank sump quick
drain valve, fuel tank external sump quick drain valve, the fuel reservoir
quick drain valve (actuated by a push-pull drain control on cargo pod),
and fuel filter quick-drain valve to determine if contaminants are present
and ensure the airplane has been fueled with the proper fuel. If the
airplane is parked with one wing low on a sloping ramp, draining of the
outboard fuel tank sump quick-drain valves (if installed) is also
recommended.
If contamination is detected, drain all fuel drain points again. Take
repeated samples from all fuel drain points until all contamination has
been removed. If, after repeated sampling, evidence of contamination
still exists, the airplane should not be flown. Tanks should be drained
and system purged by qualified maintenance personnel. All evidence of
contamination must be removed before further flight. If the airplane has
been serviced with the improper fuel grade, defuel completely and
refuel with the correct grade. Do not fly the airplane with contaminated
or unapproved fuel.
In addition, Owners/Operators who are not acquainted with a particular
fixed base operator should be assured that the fuel supply has been
checked for contamination and is properly filtered before allowing the
airplane to be serviced. Fuel tanks should be kept full between flights,
provided weight and balance considerations will permit, to reduce the
possibility of water condensing on the walls of partially filled tanks.
(Continued Next Page)
208BPHCUS-00 8-27
U.S.