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WARNING: YOU MUST MAKE SURE THAT THE ENGINE IS SAFE BEFORE
YOU DO WORK ON THE ENGINE CONTROLS. DISCONNECT THE
SPARK PLUG LEADS. MAKE SURE THAT :
- THE IGNITION SWITCH IS IN THE “OFF” POSITION.
- THE “P” LEADS ARE GROUNDED.
- THE THROTTLE IS SET TO “IDLE”.
- THE MIXTURE CONTROL IS SET TO “LEAN CUT-OFF”.
(1) Remove the engine cowlings. Refer to Chapter 71-10.
(2) Disconnect the airplane battery. Refer to Chapter 24-31.
(3) Make the engine safe:
– Disconnect the spark plug leads.
– Make sure that the ignition switch is in
the “OFF” position.
– Make sure the “P” leads are grounded.
– Set the throttle to IDLE.
– Mixture control set to LEAN CUT-OFF.
(4) Disconnect the cable end at the engine
mixture control lever:
For aircraft with a standard fuel pump:
– Remove the nut from the attachment
bolt.
– Pull the cable clear.
For aircraft with an altitude compensating
fuel pump:
– Remove the nut and outer washers
from the attachment bolt.
– Remove the mixture cable rod-end from
the mixture control lever.
Refer to Figure 3a.
Refer to Figure 3b.
DA20-C1 AMM
Engine Controls
Doc # DA201-C1
Rev. 10 76-00-00 Page 207
23 Jun 2004
Figure 3a: Mixture Control Installation
Engine Controls
DA20-C1 AMM
Page 208
23 Jun 2004 76-00-00 Doc # DA201-C1
Rev. 10
Figure 3b: Mixture Control Installation (Altitude Compensating Fuel Pump)
CENTRE CONSOLE
FIREWALL
Firewall
Feed Thru
Bracket on
Apron Baffle
Mixture
Control Lever
Bolt
Self-Locking Nut
Washer
Mixture Control
Bowden Cable
Fuel Injection
Pump
Forward
Adjustment Nut
Knob
Lock-Out
Lever
Swivel
Control Quadrant
Tab (RH)
Aft Adjustment
Nut
Mixture Control
Lever
MIXTURE CONTROL
CABLE PATH
Cable Keeper
Large Washer
Small Washers
DA20-C1 AMM
Engine Controls
Doc # DA201-C1
Rev. 10 76-00-00 Page 209
23 Jun 2004
Detail Steps/Work Items Key Items
(5) Remove the bowden cable from the support
bracket at the apron:
For aircraft with a standard fuel pump:
− Remove the bottom nut from the bowden
cable.
− Move the bowden cable clear of the
bracket.
− Remove the top nut from the bowden
cable.
For aircraft with an altitude compensating
fuel pump:
− Remove the nuts, washers and screws
that fasten the mixture cable keeper to
the mixture support bracket.
− Remove the mixture cable keeper.
− Remove the mixture cable from the
mixture support bracket.
(6) For aircraft with an altitude compensating
fuel pump:
− Cut the cable tie that holds the mixture
cable to the #2 cylinder induction tube.
– Remove the rod-end and jam nut from
the mixture cable.
(7) Carefully pull the bowden cable through the
rubber grommet at the aft baffle.
(8) Remove the fire resistant sealant from the
bowden cable at the firewall.
(9) Remove the instrument panel cover. Refer to Chapter 25-10
(10) For aircraft with a standard fuel pump:
− Remove the feed-thru from the engine
side of the firewall.
For aircraft with an altitude compensating
fuel pump:
− Remove the two nuts that secure the
angled feed through to the firewall.
− Remove the washers and screws.
− Remove the two angled feed-thru halves
from the engine side of the firewall.
Engine Controls
DA20-C1 AMM
Page 210
23 Jun 2004 76-00-00 Doc # DA201-C1
Rev. 10
(11) Remove the control knobs from these levers
at the center console:
– PARKING BRAKE.
– HEAT control ON OFF.
– HEAT distribution DEFROST FLOOR.
(12) Remove the 2 parts of the engine controls
face plate from the center console cover.
− Remove the four screws.
(13) Disconnect and remove the TRIM switch
from the face plate.
Disconnect the connector below the face
plate. Lever the TRIM switch clear.
(14) Remove the center console cover from the
center console:
− Remove the six screws from the two
sides of the center console cover.
(15) Disconnect the cable wire end of the mixture
control from the mixture lever at the
quadrant.
− Loosen the swivel attachment.
(16) Disconnect the outer sheath of the mixture
control bowden cable from the tab at the
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钻石20系列AMM 2(97)
