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AMM
Engine Controls
Doc # 6.02.01
Rev. 5 76-00-00 Page 7
20 Sep 2007
C. Mixture Control
Figure 3 shows the mixture control installation. The mixture control lever sets the mixture between
RICH and LEAN. It also stops the fuel supply to the engine when set to CUT-OFF. The mixture
control lever attaches to the engine control assembly.
The mixture control lever has a lock-out lever attached. The lock-out lever prevents accidental
movement of the mixture control lever. The spring loaded lock-out lever engages in a toothed rack.
The toothed rack attaches to the tubular spacers at the right side of the engine control assembly.
A Bowden cable connects between the mixture control lever in the cockpit and the mixture lever
at the engine. The Bowden cable wire end attaches to the mixture control lever through a hole in
a swivel fitting. A screw locks the wire end in position. A small bracket holds the inboard end of the
swivel fitting. Two nuts, bolts and washers attach the bracket to the mixture control lever.
The outer sheath of the Bowden cable has a threaded end fitting. Two nuts attach the end fitting
to a bracket attached between the sides of the engine control assembly. The Bowden cable goes
from the center console up, in front of the instrument panel and through the firewall to the engine
bay. A feed-thru fitting holds the cable in position at the firewall. A fire resistant compound seals
the Bowden cable where it goes through the firewall.
From the firewall the Bowden cable goes up, over the right side of the engine through the rear air
cooling baffle. It goes through the front air baffle and crosses to the left side of the engine. It goes
down behind the propeller governor to the fuel mixture lever on the injector. The threaded end of
the Bowden cable outer sheath then attaches to a bracket with two nuts. You can adjust the range
of movement of the mixture control lever at this position. The Bowden cable eye end fitting attaches
to the mixture lever with a long bolt, spacer, washer and nut.
The eye end is adjustable. You can use this adjustment to set the correct range of movement of
the mixture lever.
AIRCRAFT
Engine Controls DA 40 Series
AMM
Page 8
20 Sep 2007 76-00-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Engine Controls
Doc # 6.02.01
Rev. 5 76-00-00 Page 101
20 Sep 2007
Trouble-Shooting
1. General
Use the data below to trouble-shoot the engine controls. See also the Lycoming Maintenance Manual
for the engine.
Complaint Possible Cause Remedy
Engine will not start. Mixture controls not correctly
adjusted.
Do a range of movement
check. Adjust the mixture
controls.
Engine will not cut-off. Mixture controls not correctly
adjusted.
Do a range of movement
check. Adjust the mixture
controls.
Cannot control the engine. Broken throttle Bowden cable.
Throttle control not set
correctly.
Bowden cable not free to
move.
Replace the broken cable.
Do a range of movement
check. Adjust the throttle
controls.
Replace the Bowden cable.
Throttle lever hard to move. Friction adjuster incorrectly set.
Throttle control lever
restriction.
Check/adjust friction adjuster.
Remove the restriction.
Engine does not give full
power.
Throttle lever touches the
cockpit stop before the lever
on the engine touches its stop.
Do a range of movement
check. Adjust the throttle
controls.
Idle RPM changes each time
idle is set.
Throttle lever touches the
cockpit stop before the lever
on the engine touches its stop.
Do a range of movement
check. Adjust the throttle
controls.
AIRCRAFT
Engine Controls DA 40 Series
AMM
Page 102
20 Sep 2007 76-00-00 Doc # 6.02.01
Rev. 5
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AIRCRAFT
DA 40 Series
AMM
Engine Controls
Doc # 6.02.01
Rev. 5 76-00-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
These maintenance practices tell you how to remove, install and adjust the Bowden cables for the
engine controls. They do not tell you how to adjust the engine fuel injector.
Refer to the Lycoming Maintenance Manual for the data on the fuel injector.
WARNING: DO ALL THE STEPS OF THE CONTROL INSTALLATION AND
ADJUSTMENT CAREFULLY. ENGINE FAILURE CAN OCCUR IF THE
CONTROL INSTALLATION AND ADJUSTMENT ARE NOT DONE
CORRECTLY. THIS CAN CAUSE DEATH OR INJURY TO PERSONS.
2. Remove/Install the Throttle Bowden Cable
A. Remove the Throttle Bowden Cable
　
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本文鏈接地址：鉆石40系列AMM 3(73)