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from moving quickly from one end of the tank to the other during flight.
There are two versions of the inboard fuel chamber. They look similar from outside, but can be
identified by the version of the fuel quantity indicating system. Version A of the inboard fuel
chamber is compatible with Version A of the fuel quantity indicating system (factory standard up
to serial number 40.054). Version B of the inboard fuel chamber is compatible with Version B of the
fuel quantity indicating system (factory standard from serial number 40.055 on). Refer to Section
28-40 for more data on the fuel quantity indication system.
Each inboard chamber has a capacity of 52.6 liters (13.9 US gal) and each outboard chamber has
a capacity of 26.1 liters (6.9 US gal). The total fuel tank capacity of each wing is 78.7 liters (20.8
US gal).
A large flexible coupling connects the inboard fuel chamber to the outboard fuel chamber. A worm
drive clamp holds the flexible coupling to the outboard chamber and another worm drive clamp
holds the flexible coupling to the inboard chamber.
Smaller diameter flexible hoses connect the inboard and outboard chambers at the top of the
chambers. Two vent connections are located at the outboard end of the outboard chamber. A
flexible hose connects the aft vent connector to a check valve. Another flexible hose connects the
check valve to a vent connector on the outer fuel tank access panel, on the lower surface of the
wing.
A flexible hose with an internal capillary tube connects to the forward vent connector of the
outboard chamber to maintain ambient pressure within the fuel tank. The flexible hose has an outlet
on the outer fuel tank access panel, on the lower surface of the wing.
The outboard chamber has a fuel filler in the top surface. You fill both the outboard chamber and
the inboard chamber 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
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.
Refer to Section 28-40 for more data on the fuel quantity indication system.
AIRCRAFT
Fuel System
DA 40 Series
AMM
Page 4
20 Sep 2007 28-10-00 Doc # 6.02.01
Rev. 5
Tank Filler
Long Range Chamber
Capillary Balance Hose
Flexible Coupling
Flexible Coupling
Balance/Vent Hoses
Balance/Vent Hoses
Inboard Chamber
Outboard Chamber
Finger Filter
Outlet Hose
Outlet Hose
from Left Tanks
Fuel Probe
Check Valve
Figure 2: Fuel Tank System in the Right Wing, Long Range Tanks installed (OÄM 40-071)
AIRCRAFT
DA 40 Series
AMM
Fuel System
Doc # 6.02.01
Rev. 5 28-10-00 Page 5
20 Sep 2007
B. Long Range Tanks (OÄM 40-071)
Figure 2 shows the fuel tank system in the right wing. The fuel tank system in the left wing is
similar.
The DA 40 has a fuel tank in each wing. Each wing tank is made of three fuel chambers: the
inboard fuel chamber, the outboard fuel chamber and the long range fuel chamber. All fuel
chambers are interconnected. Aluminum makes the fuel chambers. Baffles in the tank prevent the
fuel from moving quickly from one end of the chamber to the other during flight.
Each inboard fuel chamber has a capacity of 52.6 liters (13.9 US gal), each outboard fuel chamber
has a capacity of 26.1 liters (6.9 US gal) and each long range fuel chamber has a capacity of 15.9
liters (4.2 US gal).The total fuel tank capacity of each wing is 94.6 liters (25 US gal).
Large flexible couplings interconnect the individual fuel chambers. Worm drive clamps hold the
flexible couplings to the fuel chambers.
Smaller diameter flexible hoses interconnect the individual fuel chambers at the top of the fuel
chambers. Two vent connections are located at the inboard end of the long range fuel chamber.
A flexible hose connects the forward vent connector to a check valve. Another flexible hose
connects the check valve to a vent connector on the outer fuel tank access panel, on the lower
surface of the wing.
A flexible hose with an internal capillary tube connects to the forward vent connector of the long
range fuel chamber to maintain ambient pressure within the fuel tank. The flexible hose has an
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