钻石40飞机维护手册 DA 40 SERIES AMM 3(47)

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% 3. Fuel System Components
% A. Flexible Hoses
% The fuel system uses synthetic flexible hoses. The flexible hose in the engine bay have integral fire-% protection sleeves.
% You must only use approved hoses in the fuel system which have been pressure tested.
% B. Emergency Fuel Valve
% The emergency fuel valve is located below the cockpit floor. It is a three-way valve. A long shaft % connects the valve to a control lever which is located in the cockpit. The control lever is mounted % in the center console, aft of the engine control assembly.
% To move the control lever you must lift a safety lock on top of the lever while you turn the control % lever.
% If you set the control lever to NORMAL then only the left wing tank will supply fuel. If you set the % control lever to EMERG TRANSFER then only the right wing tank will supply fuel. If you set the % control lever to OFF then fuel will not be supplied from the tanks.
Doc # 6.02.01 Page 3
Rev. 4 09 Jan 2003

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AMM

% C. Fuel Gascolator and Filter
% The gascolator connects to the emergency fuel valve. It has a filter and it has a fuel drain. You can % remove the filter for cleaning/replacement. Use the fuel drain to drain the fuel distribution system % and to drain fuel when you will do a test for fuel contamination.
% D. Fuel Transfer Pump
% The fuel transfer pump is located in the fuselage, below the cockpit floor. Electrical power is supplied % from the main electrical bus. The FUEL TRANS . switch in the lower left side of the instrument % panel controls the fuel transfer pump. A 10 ampère circuit-breaker protects the fuel transfer pump % electrical system.
% The pump is a high-pressure rotary pump.
% 4. Fuel Transfer System Operation
% In the usual operation, fuel flows from the left tank, through the emergency fuel valve to the engine. % Return fuel from the engine passes through the cooling loop in the right tank and then into the left tank.
% If the FUEL TRANS . switch is set to ON, the transfer pump moves fuel from the right tank to the left % tank until either:
%) The fuel transfer pump shut-off switch (high fuel sensor) in the left tank senses that the left tank is % full. This shuts the pump OFF.
%) The fuel transfer pump shut-off switch (low fuel sensor) in the right tank senses that the fuel tank % is empty. This shuts the pump OFF.
Page 4 Doc # 6.02.01 09 Jan 2003 Rev. 4
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Fuel System
AMM

% Trouble-Shooting % 1. General
% The table below lists the defects you could have with the fuel distribution system. If you have the % trouble detailed in the Trouble column read across to the Possible Cause column. Then do the repair % given in the Repair column.
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Trouble  Possible Cause  Repair 
Airplane smells of fuel.  Hose/Pipe leaking. Loose connection. Component leaking.  Examine all hoses and pipes. Replace defective components. Examine all connections. Tighten loose connections. Examine all components. Replace defective components. 
Fuel does not transfer correctly.  Fuel transfer pump circuit-breaker not set. Fuel transfer pump defective. Low fuel sensor in right tank defective. High fuel sensor in left tank defective FUEL TRANS . switch in instrument panel defective. Wiring defective.  Set the transfer pump circuit-breaker. Replace the transfer pump. Replace the sensor. Replace the sensor. Replace the switch. Repair wiring. 

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Doc # 6.02.01 Page 101
Rev. 4 09 Jan 2003

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AMM

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Fuel System
AMM

　
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