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outlet on the outer fuel tank access panel, on the lower surface of the wing.
The long range fuel chamber has a fuel filler in the top surface. You fill all fuel chambers through
the fuel filler. The filler cap has a locking lever. You pull the locking lever up and turn the filler cap
counter-clockwise to release it. You turn the cap clockwise to install it and push down the locking
lever to lock it.
The inboard fuel chamber has the outlet for the fuel feed to the engine. A finger filter prevents
debris from entering the fuel system. A drain valve is located in the lower surface of the inboard fuel
chamber. You can use this drain point for defueling the fuel tank and for doing fuel contamination
tests.
A fuel sensor and a fuel probe attach to the inboard end of each of the inboard fuel chambers. A
fuel probe also attaches to the inboard end of each of the long range fuel chambers. Refer to
Section 28-40 for more data on the fuel quantity indication system.
AIRCRAFT
Fuel System
DA 40 Series
AMM
Page 6
20 Sep 2007 28-10-00 Doc # 6.02.01
Rev. 5
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AIRCRAFT
DA 40 Series
AMM
Fuel System
Doc # 6.02.01
Rev. 5 28-10-00 Page 101
20 Sep 2007
Trouble-Shooting
1. General
The table below lists the defects you could have with the fuel storage 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.
Trouble Possible Cause Repair
Filler cap leaking. Filler cap gasket damaged. Replace filler cap gasket.
Fuel drain valve leaking. Drain valve damaged.
Contamination in drain valve.
Replace fuel drain valve.
Open and close drain valve.
Do this until the drain seals. If
the drain does not seal then
replace the drain valve.
AIRCRAFT
Fuel System
DA 40 Series
AMM
Page 102
20 Sep 2007 28-10-00 Doc # 6.02.01
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AIRCRAFT
DA 40 Series
AMM
Fuel System
Doc # 6.02.01
Rev. 5 28-10-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
These maintenance practices tell you how to remove/install the fuel tanks. Obey the safety precautions
for fuel at all times.
WARNING: DO NOT GET FUEL ON YOU. FUEL CAN CAUSE SKIN DISEASE.
WARNING: DO NOT ALLOW FIRE NEAR FUEL. FUEL BURNS AND CAN CAUSE
INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
WARNING: DO NOT BREATH FUEL VAPOR. FUEL VAPOR CAN MAKE YOU ILL.
2. Remove/Disassemble the Fuel Tank Assembly
A. Remove the Fuel Tank Assembly
Detail Steps/Work Items Key Items/References
(1) Remove the wing which has the fuel tank that you
will remove and support the wing on trestles.
Refer to Section 57-10.
(2) Remove the access panel from the root rib of the
wing:
S Remove the 11 nuts and washers from the
studs.
% S If access panel is made from aluminium
% (DA4-5741-26-00_2) remove bonding cable.
S Pull the access panel of the studs and clear
of the airplane.
(3) Remove the fuel drain valve:
S Remove the access panel.
S Cut the lock-wire.
S Remove the drain valve from its mounting.
Refer to Figure 3 (Standard Tanks) or
Figure 4 (Long Range Tanks).
Refer to Section 52-40.
(4) Disconnect the electrical connector for the fuel
probe in the inboard chamber.
At the in-line connector.
(5) Disconnect the electrical connector for the fuel
sensor in the inboard chamber.
At the in-line connector.
AIRCRAFT
Fuel System
DA 40 Series
AMM
Page 202
20 Sep 2007 28-10-00 Doc # 6.02.01
Rev. 5
Fuel Sensor
Fuel Probe
Fuel Outlet and
Finger Filter
Bonding Cable
Fuel Drain
Vent/Balance Hoses
Vent Hose
Capillary
Hose
Check Valve
Fuel Filler Cap
Attaching Screw
O-Ring Seal
Spacer Ring
Fuel Filler Flange
Fixing Ring
Bonding Cable
Bonding Cable Connecting
Link
Mounting Bands
Flexible Coupling
Figure 3: Remove/Install the Standard Fuel Tanks
AIRCRAFT
DA 40 Series
AMM
Fuel System
Doc # 6.02.01
Rev. 5 28-10-00 Page 203
20 Sep 2007
Detail Steps/Work Items Key Items/References
(6) Release the bonding cable from the inboard end
of the inboard chamber:
S Remove the nut and washer from the bolt.
S Remove the bonding cable from the bolt and
move it clear of the fuel chamber.
S Remove the bolt.
%
(7) Disconnect the vent hose and the capillary hose
from the outboard end of the outboard chamber
　
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