AEROPRAKT 22LS, Руководство по эксплуатации для пилотов

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AEROPRAKT-22LS Pilot Operating Handbook A22LS-POH-04
8.6 Fuel system
The fuel system (see Fig. 3 ) includes two wing fuel tanks (1,2), feed fuel lines
(5,6,9,10,12,14,16,18,20,22,23), return line (25), two shut-off valves (7,8), fuel sediment
collector (13), fuel filter (15), fuel pump (19), drain line (26) and drain valve (27). The fuel
tanks are located at the wing root between the spar and aft web. The fuel inlet 3(4) is
located at the front outboard corner of the tank. The inlet cover has vent fitting 30(31)
connecting the tank volume free of fuel to the atmosphere. The fuel shut-off valves (7,8)
are located on the vertical beams of the frame No.3, on the left and right sides respectively.
The shut-off valve is open when its handle is set vertically and closed when the handle is
set horizontally. The left and right fuel tank is connected with the fuel lines to the left and
right fuel shut-off valve respectively. Further two fuel lines are joined into a single one with
the T-connector (11). Then fuel comes to the sediment collector (13). The sediment
collector is located behind the main landing gear beam on the bottom rear panel of the
fuselage. The top outlet of the fuel sediment collector is connected to the fuel filter (15)
located on the right side behind the main landing gear beam and can be inspected visually.
The bottom outlet of the fuel sediment collector is connected with a fuel line (25) to the
drain valve (26), located behind the main landing gear beam on bottom rear panel of the
fuselage. The drain valve allows draining fuel through the hole in the bottom rear panel of
fuselage. The valve handle is accessible outside fuselage. After the fuel filter the fuel line
(16) runs through the main landing gear beam, seat beam along the right-hand side of
fuselage to the frame No.1 where it is connected with bulkhead fitting (17) to the fuel line of
the engine (18) that is connected to the inlet of the fuel pump (19) located on the right-hand
side of the engine gearbox. The pump outlet is connected with the fuel lines (20,22,23) to
the carburetors (21, 24). The excessive fuel is returned through the line (24) to the
sediment collector (13). The fuel system may optionally contain the fuel pressure sensor
(28) and fuel flow transducer (29) for monitoring of its functionality.
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