Section 8 Pilot’s Operating Handbook
Handling, Servicing and Maintenance EXTRA 500
drains are located near each wing root and at the outer end of
each fuel tank, the gascolator drain is located on the right
underside of the fuselage between the nose gear and the main
gear wheel bay. A small plastic cup is supplied in the map
compartment for obtaining fuel samples.
Warning: Take fuel samples with care. Water remaining in the fuel
system could ice and clog lines or filters or cause an engine
flameout.
Note Take fuel samples only with aircraft on level surface.
To collect a fuel sample, push upward the drain valve by means
of the plastic cup to open the valve momentarily and drain fuel
into the cup. If water and fuel are in the cup a distinct line
separating the water from the fuel will be seen through the
transparent cup wall. Water, being heavier, will settle in the
bottom of the cup, while the (normally oily yellowish) fuel will
remain on the top. If water was detected continue to take fuel
samples until all water is purged from the tank.
8-8 26. January 2011
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