Textron Cessna 172S Skyhawk SP, Information Manual

Page: 189 / 491

SEGTIGN7
AI RPLANE&' SYSTEMS-DESCRIPTION
NOTE
CESSNA
MODEL
172S
i
I
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 RI~HT 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, the fuel reservoir sump, the fuel selector
drain . 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.
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7-28
July
8/98
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