Cirrus Design Section 8
SR22 Handling and Servicing
P/N 13772-002 8-23P/N 13772-002 8-23
If sampling reveals contamination, the gascolator and tank drains must
be sampled again repeatedly until all contamination is removed. It is
helpful to gently rock the wings and lower the tail slightly to move
contaminates to the drain points for sampling. If after repeated
samplings (three or more), evidence of significant contamination
remains, do not fly the airplane until a mechanic is consulted, the fuel
system is drained and purged, and the source of contamination is
determined and corrected.
Airplane Serials 3026 thru 3420 before SB 2X-28-08 : The gascolator
incorporates a filter bypass that activates a red, pop-up tab when
pressure drop across the gascolator reaches 0.8 ± 0.2 PSI. The filter
is bypassed when the pressure drop reaches 1.20 ± 0.2 PSI. Once the
pop-up tab is activated, the fuel filter element must be replaced and
the pop-up tab manually reset. Do not attempt to clean the filter
element.
If sampling reveals the airplane has been serviced with an improper
fuel grade, do not fly the airplane until the fuel system is drained and
refueled with an approved fuel grade.
To help reduce the occurrence of contaminated fuel coming from the
supplier or fixed based operator, pilots should assure that the fuel
supply has been checked for contamination and that the fuel is
properly filtered. Also, between flights, the fuel tanks should be kept as
full as operational conditions permit to reduce condensation on the
inside of fuel tanks.
Draining Fuel System
The bulk of the fuel may be drained from the wing fuel tanks by the use
of a siphon hose placed in the cell or tank through the filler neck. The
remainder of the fuel may be drained by opening the drain valves. Use
the same precautions as when refueling airplane. Refer to the AMM
for specific procedures.
Reissue A
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