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Cable
Fuel Pressure
Connector
Fuel Flow
Connector
Manifold Pressure
Connector
LASAR
Connector
EGT and CHT
In-Line Connectors
Figure 2: Electrical Cables on the Left Side of the Engine compartment
AIRCRAFT
DA 40 Series
AMM
Power Plant
Doc # 6.02.01
Rev. 5 71-50-00 Page 5
20 Sep 2007
EGT and CHT
In-Line Connectors
Alternator
Ground
Alternator
Connections
Engine
Ground
P-Clamp
Ground
Plate
Figure 3: Electrical Cables on the Right Side of the Engine Compartment
AIRCRAFT
Power Plant DA 40 Series
AMM
Page 6
20 Sep 2007 71-50-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Power Plant
Doc # 6.02.01
Rev. 5 71-51-00 Page 1
20 Sep 2007
Section 71-51
Electrical Cables in the Engine Compartment - TAE 125 Diesel Engine
1. General
The engine compartment has a main electrical wiring harness. It is supplied as part of the engine
installation. The harness has all of the low-power cables for the engine control system. It is integral with
the engine control system. Refer to Section 76-01 for data about the main electrical wiring harness.
There are a small number of separate cables for the alternator and starter. See Chapter 24 for data
about the battery and alternator wiring. See Chapter 80 for more data about the starter cables. See
Chapter 92 wiring diagrams for data about the cables in each system.
AIRCRAFT
Power Plant DA 40 Series
AMM
Page 2
20 Sep 2007 71-51-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Power Plant
Doc # 6.02.01
Rev. 5 71-60-00 Page 1
20 Sep 2007
Section 71-60
Air Intakes - Lycoming Engine
1. General
An alternate air valve assembly, air filter housing and air filter make the engine air intake system for the
DA 40 Airplane. The engine bottom cowling has a molded air intake duct and a flexible seal attached
to the air filter housing makes the joint between the engine cowling and the engine intake. Figure 1
shows the engine air filter and alternate air intake.
2. Description
The air intake has 3 main parts:
) Alternate air valve assembly.
) Air filter housing.
) Air filter.
A. Alternate Air Valve Assembly
The alternate air valve assembly has a valve body which has 6 air inlet holes around its
circumference. A Bowden cable attaches to the valve body and rotates the valve body inside the
valve flange. O-ring seals locates at each end of the valve body to make a seal between the valve
body and the valve flange.
The valve flange has 6 air inlet holes drilled around its circumference. A suction sleeve locates inside
the valve flange and passes through the center of the alternate air valve assembly.
B. Air Filter Housing
The air filter housing has a flexible seal which makes a seal between the air intake assembly and
the engine bottom cowling. The flexible seal attaches to the air filter housing with bolts. Bolts with
spacers attach both the air filter housing and the alternate air valve to the fuel injector. One of the
spacers has a support bracket for the Bowden cable.
C. Air Filter
The air filter has a paper type element. The air filter locates on the air filter housing and is held by
a worm-drive clamp.
AIRCRAFT
Power Plant DA 40 Series
AMM
Page 2
20 Sep 2007 71-60-00 Doc # 6.02.01
Rev. 5
O-Rings
Spacer
Flange
Suction Sleeve
Valve Body
Operating Cable
Air Filter
Worm-Drive
Clamp
Flexible Seal
Air Filter Housing
(Cut Away)
Fuel Injector
Alternate Air Inlets (6)
Usual Air Inlet
ALTERNATE AIR
VALVE ASSEMBLY
ALTERNATE AIR VALVE
EXPLODED VIEW
Figure 1: Engine Air Filter and Alternate Air Intake
AIRCRAFT
DA 40 Series
AMM
Power Plant
Doc # 6.02.01
Rev. 5 71-60-00 Page 3
20 Sep 2007
3. Operation
Figure 2 shows the alternate air control lever in the cockpit. It is located on the left side of the center
console under the instrument panel. A Bowden control cable connects the control lever in the cockpit
to the alternate air valve assembly in the engine bay.
In normal operation the alternate air control lever is set to the OFF position. The holes in the alternate
air valve body and the flanged housing do not align and ambient air flows through the air filter into the
fuel injector.
When the alternate air control lever in the cockpit is moved to the alternate air position, the Bowden
　
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