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(4) Install the bowden cable to the support
bracket at the air intake.
(5) Install the cable end to the alternate air lever
at the air intake.
(6) Install the feed-thru to the engine side of the
firewall with firewall sealant.
− Make sure you seal the firewall correctly.
Use Product PR 812,
(MIL-S-38249 Type 1) Fire Wall Sealant.
(7) Item deleted.
(8) Do a test for correct range, full and free
movement of the alternate air control
system.
Refer to the Mixture Control Test
Procedure in this Chapter.
(9) Do an inspection of the control connections
which you disconnected. If necessary for
your airworthiness authority, do a second
inspection of the controls.
(10) Do a check for loose items in the cockpit.
Specially in the area of the control quadrant.
(11) Install the instrument panel cover. Refer to Chapter 25-10.
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Detail Steps/Work Items Key Items
(12) Install the center console cover to the center
console.
(13) Install the TRIM switch to the face plate. Push the Trim switch into position in the
face plate. Connect the connector below
the face plate.
(14) Install the 2 parts of the engine controls face
plate to the center console cover.
(15) Install the control lever knobs to these items:
− PARKING BRAKE.
− HEAT control ON OFF.
− HEAT distribution DEFROST FLOOR.
(16) Do an engine controls freedom of movement
check.
(17) Install the ignition leads to the spark plugs.
Tighten the “B” nuts.
Torque to 12.4 Nm (110-120 in lbs).
(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.
DA20-C1 AMM
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5. Throttle/Mixture Control Range Of Movement Test
These procedure tells you how to do a throttle and a mixture control range of movement test. They
do not tell you how to adjust the engine fuel control units. Refer to the IO-240-B Teledyne
Continental Motors Maintenance Manual for data on the engine fuel control units.
Do the throttle/mixture control range of movement test using 2 persons. You must make sure that
the throttle/mixture control lever hits the stops on the throttle/mixture valve before it hits the stops on
the control quadrant. This will make sure that the throttle/mixture control has the correct range of
movement. You should set the controls to give 3 mm (0.125 in) clearance (bounce) at the face
plate,
A. Throttle Control Range Of Movement Test
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) Move the throttle control lever between IDLE
and FULL.
− Make sure the lever moves freely with no
restriction.
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Detail Steps/Work Items Key Items
(5) Set the throttle control lever to FULL and
hold it in position.
− Make sure the throttle valve lever hits the
FULL stop at the throttle valve. If
necessary, adjust the bowden cable
outer sheath at the engine support
bracket.
With the throttle valve lever on the full stop,
there must be a minimum of 3mm (0.125
in) clearance (bounce) between the face
plate and the throttle lever in the cockpit.
(6) Set the throttle control lever to IDLE and hold
it in position.
− Make sure the throttle valve lever hits the
IDLE stop at the throttle valve. If
　
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