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plugs. Tighten the “B” nuts.
Torque to 12.4-13.5 Nm (110-120 in lbs)
(44a) Bleed the engine fuel system. Chapter 73-00
(45) Do an engine fuel system test. Refer to the IO-240B Teledyne Continental
Maintenance Manual.
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DA20-C1 AMM
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Detail Steps/Work Items Key Items
(46) Do an engine test.
− Record data from engine test.
Refer to the IO-240B Teledyne Continental
Maintenance Manual.
(47) Install the engine cowlings. Refer to Chapter 71-10.
CAUTION: TELEDYNE CONTINENTAL RECOMMEND THAT YOU DO A FLIGHT
TEST BEFORE YOU RELEASE THE AIRPLANE FOR NORMAL USE.
THIS WILL MAKE SURE THE PISTON RINGS HAVE SEATED. AND
THAT THERE ARE NO LEAKS FROM THE ENGINE SYSTEMS.
(48) Do an engine flight test. Refer to the IO-240B Teledyne Continental
Maintenance Manual Section 6-30 and the
Airplane Flight Manual for Operating
Limits.
DA20-C1 AMM
Power Plant
Doc # DA201-C1
Rev. 9 71-10-00 Page 1
29 Apr 2004
CHAPTER 71-10
COWLING
1. General
The DA20-C1 has two cowlings. It has a top cowling and a bottom cowling. The two halves attach
to the airframe with camlock fasteners. The top cowling has a left and a right air intake. It also has
an inspection panel to give you access to the engine oil dipstick. The bottom cowling has one large
air intake.
Figure 1 shows the two cowlings.
Power Plant
DA20-C1 AMM
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19 Dec 1997 71-10-00 Doc # DA201-C1
Rev. 0
Figure 1: Engine Cowlings
DA20-C1 AMM
Power Plant
Doc # DA201-C1
Rev. 9 71-10-00 Page 3
29 Apr 2004
2. Description
GFRP or CFRP moldings make the power plant top and bottom cowlings. A strip of carbon fiber
bonded to the edges of the cowlings makes them strong. Camlock fasteners installed around the
edge of the cowlings attach them to the airframe. A hinge attaches the oil filler access panel to the
top cowling and a rotary lock holds it closed. Polyurethane paint protects the outside skin from
ultraviolet rays and humidity. The insides of the cowlings have a layer of fire resistant paint applied
for protection.
Two holes at the front of the top cowling supply ram air to cool the engine. The one hole at the front
of the bottom cowling supplies ram air to the air intake.
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DA20-C1 AMM
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DA20-C1 AMM
Power Plant
Doc # DA201-C1
Rev. 0 71-10-00 Page 101
19 Dec 1997
TROUBLE SHOOTING
1. General
The table below lists the defects you could have in the cowlings. If you have the trouble detailed in
the Trouble column read across to the Possible Cause column. Then do the repair in the Repair
column.
Trouble Possible Cause Repair
Cowling damaged. Not installed correctly. Replace/Repair damaged
cowling.
Camlock fastener
damaged/missing.
Camlock fastener defective. Replace the defective
Camlock fastener.
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DA20-C1 AMM
Power Plant
Doc # DA201-C1
Rev. 14 71-10-00 Page 201
30 Oct 2008
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove and install the cowlings and how to do a high
temperature paint repair of a cowling.
WARNING: DO NOT STAND WITHIN THE DANGER AREA OF THE PROPELLER.
IF THE ENGINE STARTS, THE PROPELLER CAN CAUSE DEATH OR
INJURY TO PERSONS.
2. Remove/Install The Cowlings
A. Remove The Cowlings
Detail Steps/Work Items Key Items
(1) Unlock the camlock fasteners from the top
cowling.
(2) Remove the top cowling from the airplane.
(3) Unlock the camlock fasteners from the
bottom cowling.
Hold the cowling.
(4) Remove the bottom cowling from the
airplane.
B. Install The Cowlings
Detail Steps/Work Items Key Items
(1) Inspect the cowlings for damage. Look
specially for damage to the camlock
fasteners
(2) Put the bottom cowling in position on the
bottom of the airplane.
− Lock the camlock fasteners.
Lightly tap all the fasteners to make sure
they are locked correctly.
(3) Put the top cowling in position on the top of
the airplane.
− Lock the camlock fasteners.
Lightly tap all the fasteners to make sure
they are locked correctly.
Power Plant
DA20-C1 AMM
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30 Oct 2008 71-10-00 Doc # DA201-C1
Rev. 14
3. High Temperature Paint Repair of a Cowling
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