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Doc # 6.02.01
Rev. 5 71-10-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
This section contains the maintenance practices for the cowlings. It tells you how to remove/install the
cowlings. It also tells you how to clean and paint the cowlings.
2. Remove the Engine Cowlings
A. Remove the Top Cowling
Detail Steps/Work Items Key Items/References
(1) Release the quick-release fasteners which hold
the top cowling.
Refer to Figure 1.
(2) Pull the side of the cowling gently outwards and
upwards.
(3) Move the top cowling away from the airplane.
B. Remove the Bottom Cowling
Detail Steps/Work Items Key Items/References
WARNING: YOU MUST MAKE SURE THAT THE ENGINE IS SAFE BEFORE YOU
TURN THE PROPELLER. MAKE SURE THAT THE IGNITION SWITCH
IS SET TO “OFF”. SET THE THROTTLE TO “IDLE” AND THE
MIXTURE CONTROL TO “LEAN CUT-OFF”.
(1) Turn the propeller backwards until the top blade
is vertical.
(2) Release the quick-release fastener which holds
the “y” connector to the bottom cowling.
Refer to Figure 1.
(3) Remove the “Y” connector from the intake:
S Pull the “Y” connector aft and clear of the
intake tube.
From the inside of the cowling.
AIRCRAFT
Power Plant DA 40 Series
AMM
Page 202
20 Sep 2007 71-10-00 Doc # 6.02.01
Rev. 5
Detail Steps/Work Items Key Items/References
(4) Release the quick-release fasteners which hold
the bottom cowling.
Hold the bottom cowling!
(5) Remove the bottom cowling:
S Lower the rear of the cowling.
S Move the cowling down and aft.
S Move the cowling clear of the exhaust and
away from the airplane.
Take great care not to catch the cowling
on the propeller!
Take care not catch the cowling on the
exhaust.
3. Install the Engine Cowlings
A. Install the Bottom Cowling
Detail Steps/Work Items Key Items/References
(1) Examine the bottom cowling. Make sure that :
S The cowling is clean.
S The cowling is not damaged.
S The quick-release fasteners are not
missing/damaged.
Repair any damage.
Replace missing/damaged fasteners.
(2) Lift the cowling into position:
S Move the cowling into position around the
exhaust outlet.
S Move the cowling upwards.
S Locate the front of the cowling over the
injector air inlet.
S Lift the back of the cowling into position.
S Tighten the quick-release fasteners.
Take care not to catch the cowling on the
exhaust outlet.
Take great care not to catch the cowling
on the propeller!
AIRCRAFT
DA 40 Series
AMM
Power Plant
Detail Steps/Work Items Key Items/References
Doc # 6.02.01
Rev. 5 71-10-00 Page 203
20 Sep 2007
(3) Install the “Y” connector:
S Move the “Y” connector into position over the
air intake.
S Engage and tighten the quick-release
fastener which attaches the connector to the
bottom cowling.
B. Install the Top Cowling
Detail Steps/Work Items Key Items/References
(1) Examine the top cowling. Make sure that :
S The cowling is clean.
S The cowling is not damaged.
S The quick-release fasteners are not
missing/damaged.
Repair any damage.
Replace missing/damaged fasteners.
(2) Move the top cowling into position over the
engine.
(3) Gently pull the edges of the cowling apart and
lower the cowling into position.
(4) Tighten the quick-release fasteners.
4. Cleaning and Painting
A. Clean the Cowling
Detail Steps/Work Items Key Items/References
(1) Wash the outer surface with a mixture of water
and a mild detergent.
Obey the detergent manufacturer’s
instructions.
(2) Wash the inner surface with a mixture of water
and a mild detergent.
Obey the detergent manufacturer’s
instructions.
CAUTION: DO NOT USE POLISH CONTAINING SILICONE. SILICONE MAKES
GFRP REPAIR DIFFICULT.
(3) Polish the outer surface with wax polish. Obey the polish manufacturer’s
instructions. Do not use silicone polish.
AIRCRAFT
Power Plant DA 40 Series
AMM
Page 204
20 Sep 2007 71-10-00 Doc # 6.02.01
Rev. 5
B. Paint the Inside of the Cowling
This Paragraph gives the data for painting the inside of the engine cowlings with fire protection paint. Refer
to Section 51-20 for repairs and painting the outside of the cowlings.
Detail Steps/Work Items Key Items/References
(1) Clean the inside of the cowling.
(2) Make the area rough for painting. Use 150-320 grade wet and dry paper.
　
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