Pilot’s Operating Handbook Section 7
EXTRA 500 Description of Airplane and Systems
7.16 Fuel
(Refer to Figure 7-14) The aircraft fuel system is a gravity
assisted pump fed system where two equal fuel boost pumps
deliver fuel from the collector compartment of the wing tanks to
the engine with proper flow and pressure.
If one of the boost pumps is operational, the other serves as an
inactive backup.
Note For fuel capacities and fuel grades refer to relevant
Sections 1 and 2 of this POH.
7.16.a Wing Tanks
The fuel tank consists of a left hand and right hand integral
wing tank between front and rear spar, which extends from the
root rib at station 550 to the rib at station 4300. The wing tanks
are subdivided in three compartments each: the collector, main
and auxiliary compartment. Both main compartments in-
corporate a slosh rib at station 1550.
Fuel is supplied to the engine from the collector compartments
located near the root ribs of each wing between stations 550 and
800.
Each wing tank has two – one for the main and one for the
auxiliary compartment – flush lightning protected filler caps for
gravity refueling. The fuel pick up ports for engine supply are
located in the collector compartments. Below the pick up points
drainable sumps are located inside the wing-fuselage fairing as
a trap for water to prevent it to contaminate fuel supply to the
engine.
26. January 2011 7-41
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