CHAPTER 28
PAGE 14
PAGE DATE: 21. March 2014
MAINTENANCE MANUAL EXTRA 300LT
28-20-00 DISTRIBUTION
(Refer to figure 7) Flexible hoses and aluminium tubes
(A-K) connect the particular components of the fuel system.
The fuel lines connecting the wing tanks (D) meet at a tee-
fitting (7) below the copilot seat.
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. Both pumps
feature drain lines (J, K) dumping fuel overboard in case of
a malfunction. 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). An Allen 6S122 type (1) fuel selec-
tor valve 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 300LT has four fuel drain valves (4)for drainage
of moisture and sediment. One fuel drain valve labelled
WING TANK DRAIN is located in the root section of the
underside of each wing. The fuel drain valve for the center
and acro tank (CENTER TANK DRAIN) is located under the
fuselage in the area of the landing gear. Another fuel drain
valve which is connected to the fuel gascolator is located in
the lowest point at the right side of the firewall
(GASCOLATOR DRAIN).
To Next Page
Loading...
