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(18) Connect the airplane battery. Refer to Chapter 24-31.
(19) Install the engine cowlings. Refer to Chapter 71-10.
(20) Do an operational check of the elevator trim
control system.
(21) Do an engine test. Refer to the DA20-C1 Flight Manual.
Engine Controls
DA20-C1 AMM
Page 214
23 Jun 2004 76-00-00 Doc # DA201-C1
Rev. 10
CENTER CONSOLE
Swivel
Alternate Air
Bowden Cable
Forward Adjustment Nut
Forward Adjustment Nut
Aft Adjustment Nut
Aft Adjustment Nut
Tab On Left Side
Of Control Quadrant
Alternate Air
Control Lever
Knob
Spacer
Screw
LEFT SIDE OF ENGINE
Mounting Bracket
Spring
Bolt
Washers
Self-Locking Nut
Alternate Air
Lever
FIREWALL
Firewall
Feed Thru
Figure 4: Alternate Air Control Installation
DA20-C1 AMM
Engine Controls
Doc # DA201-C1
Rev. 10 76-00-00 Page 215
23 Jun 2004
4. Remove/Install The Alternate-Air Control Bowden-Cable
A. Remove The Alternate-Air Control Bowden-Cable
Detail Steps/Work Items Key Items
WARNING: DO NOT STAND WITHIN THE DANGER AREA OF THE
PROPELLER. IF THE ENGINE STARTS, THE PROPELLER CAN
CAUSE DEATH OR INJURY TO PERSONS.
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 control cable from the
alternate air lever. Remove these items:
− Nut
− Bolt
− Two washers
− Return spring
Refer to Figure 4.
Engine Controls
DA20-C1 AMM
Page 216
23 Jun 2004 76-00-00 Doc # DA201-C1
Rev. 10
Detail Steps/Work Items Key Items
(5) Remove the bowden cable from the bracket
at the air intake:
− Remove the forward nut from the
bowden cable.
− Move the bowden cable clear of the
bracket.
− Remove the aft nut from the bowden
cable.
(6) Remove the fire resistant sealant from the
bowden cable at the firewall.
(7) Remove the instrument panel cover. Refer to Chapter 25-10
(8) Item deleted.
(9) Remove the feed-thru from the engine side
of the firewall.
(10) Remove the control knobs from these levers
at the center console:
− PARKING BRAKE.
− HEAT control ON OFF.
− HEAT distribution DEFROST FLOOR.
(11) Remove the 2 parts of the engine controls
face plate from the center console cover.
− Remove the four screws.
(12) Disconnect and remove the TRIM switch
from the face plate.
Disconnect the connector below the face
plate. Lever the TRIM switch clear.
(13) Remove the center console cover from the
center console:
− Remove the six screws from the two
sides of the center console cover.
(14) Disconnect the cable wire end of the
alternate air control from the alternate air
lever at the quadrant.
− Loosen the swivel fitting.
(15) Disconnect the alternate-air bowden-cable
from the tab at the quadrant frame.
− Remove the two nuts.
(16) Carefully pull the bowden cable clear from
the engine side of the firewall.
DA20-C1 AMM
Engine Controls
Doc # DA201-C1
Rev. 10 76-00-00 Page 217
23 Jun 2004
B. Install The Alternate-Air Control Bowden-Cable
Detail Steps/Work Items Key Items
(1) Put the alternate-air control bowden-cable
through the firewall.
(2) Put the alternate-air control bowden-cable
through the tab at the control quadrant.
− Install the 2 nuts which attach the
bowden cable to the tab.
Refer to Figure 4
WARNING: IF YOU DO AN ADJUSTMENT OF A CONTROL CABLE YOU MUST
MAKE SURE THAT THE CONTROL CABLE IS STILL IN SAFETY.
IF YOU DO NOT DO THIS, THE CONTROL CABLE CAN
DISCONNECT. THIS CAN CAUSE DEATH OR INJURY TO
PERSONS.
(3) Install the cable end to the quadrant
alternate air lever.
− Tighten the attachment screw.
　
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