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Control
Attaching Screws
Attaching Screws
Attaching Screws
Friction Lock Knob
Throttle
Top Cover Plate
Face Plate
Base
Rear Shield Guide
Front
Shield Guide
Figure 2: Engine Power Lever Installation
AIRCRAFT
DA 40 Series
AMM
Engine Controls
Doc # 6.02.01
Rev. 5 76-01-00 Page 5
20 Sep 2007
C. Power Lever
Figure 2 shows the engine power lever installation. The power lever is a large ‘T’ -shaped lever.
It is located in the center console. The power lever has a friction lock. The lock holds the power
lever in the set position. A bar below the ‘T’ lets you set or release the friction. A button on top of
the bar lets you release the friction. The power lever assembles as a unit to the bottom cover plate
of the center console.
The power lever has two separate and independent electrical systems. One system provides
signals to the ECU A. The other system provides signals to the ECU B. Either system can control
the engine.
The lever operates electrical transducers that give signals in proportion to the power lever position.
The signals are used by the engine control system to set the power output. The control system also
sets the propeller constant speed unit to give best RPM for the power setting. Refer to Section 61-
21 for more data on the propeller control function.
AIRCRAFT
Engine Controls DA 40 Series
AMM
Page 6
20 Sep 2007 76-01-00 Doc # 6.02.01
Rev. 5
D. Sensors
Each ECU gets data about the engine performance from the following sensors mounted on the
engine:
Sensor Location
Crankshaft 1. Front, right of the crankcase.
Crankshaft 2. Front, left of the crankcase.
Camshaft 1. Front between camshafts.
Camshaft 2. Aft between camshafts.
Coolant temperature. Rear of the thermostat valve.
Oil temperature. On the connection block for the oil cooler hoses.
Oil pressure. Behind the oil filter.
Manifold air temperature. On the intercooler outlet pipe.
Manifold air pressure. On the intercooler outlet pipe.
Fuel rail pressure. At the front of the fuel rail.
Gearbox temperature. At the top left of the front bearing of the reduction gear.
AIRCRAFT
DA 40 Series
AMM
Engine Controls
Doc # 6.02.01
Rev. 5 76-01-00 Page 101
20 Sep 2007
Trouble-Shooting
1. General
The table below lists the defects you could have with the engine control 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.
For all other engine control trouble, refer to the engine manufacturer.
Trouble Possible Cause Repair
ECU caution light comes ON. ECU defective. Read engine event log (refer to
Section 72-01). Refer to the
engine manufacturer.
Engine does not respond
correctly to power lever
movement.
Run Diagnostic routine in ECU
Operator software (refer to
Section 72-01). Refer to the
engine manufacturer.
AIRCRAFT
Engine Controls DA 40 Series
AMM
Page 102
20 Sep 2007 76-01-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Engine Controls
Doc # 6.02.01
Rev. 5 76-01-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
These maintenance practices tell you how to remove and install the main components in the engine
control system. All other work on the engine control system can only be done by a TAE approved
maintenance shop or the manufacturer.
2. Remove/Install the Power Lever
A. Remove the Power Lever
Detail Steps/Work Items Key Items/References
(1) Make sure that the engine is safe:
S Set the ELECTRIC MASTER key switch to
OFF.
S Set the ENGINE MASTER switch to OFF.
S Set the power lever to IDLE.
(2) Remove the top cover plate from the center
console:
S Remove 2 screws at the bottom of the plate.
Refer to Figure 2.
(3) Remove the handle for the emergency fuel valve:
S Remove the center screw.
S Lift the handle from the shaft.
(4) Remove the 2 screws that attach the bottom
cover plate to the emergency fuel valve
mounting.
(5) Lift the bottom cover plate complete with the
power lever to give access to the electrical
connectors.
(6) Disconnect the 2 electrical in-line connectors for
the power lever.
(7) Remove the power lever from the airplane.
AIRCRAFT
Engine Controls DA 40 Series
AMM
Page 202
20 Sep 2007 76-01-00 Doc # 6.02.01
Rev. 5
B. Replace the Power Lever in the Bottom Cover Plate
　
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