CHAPTER 28
PAGE 15
PAGE DATE: 1. March 2011
MAINTENANCE MANUAL EXTRA 330LX
28-20-00 DISTRIBUTION
(Refer to figure 7) Flexible hoses and aluminium tubes
(A-L) connect the particular components of the fuel system.
The fuel lines connecting the wing tanks (D) meet at a T-
fitting (7) in the bottom center of the fuselage.
In addition to the engine driven fuel pump (6), an electrically
driven auxiliary pump (5) having sufficient capacity to feed
the engine at take-off power is fitted as a safety device
against failure of the engine driven pump. The auxiliary pump
switch is located on the rear instrument panel. A gascolator
(3) is installed between the fuel selector valve and the
auxiliary fuel pump at the firewall (engine side). A fuel
selector valve of an Allen 6S122 type (1) is located at the
right side of the front cockpit behind the main spar on a
separate support. A control rod connects the selector valve
to the control handles (2). The fuel selector valve is marked
by the letters "WT" (Wing Tank), "E" (Engine), and "CT"
(Center Tank) to ensure correct installation of fuel lines
(Refer to "Detail A" of Figure 8).
The EXTRA 330LX has three drain valves (4) for drainage of
moisture and sediment. One fuel drain valve labelled
WING TANK DRAIN is located on the left underside of the
fuselage. The fuel drain valve for the center and acro tank
(CENTER TANK DRAIN) is located on the right underside
of the fuselage. Another fuel drain valve which is connected
to the fuel gascolator is located at the right under side of the
firewall (GASCOLATOR DRAIN).
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