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Detail Steps/Work Items Key Items/References
(1) Release the quick-release fasteners which hold the bottom cowling. Hold the bottom cowling!
(2) Remove the bottom cowling: S Lower the rear of the cowling. S Move the cowling down and forward. S Move the cowling clear of the airplane. Take care not to catch the cowling on the propeller!
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% 3. Install the Engine Cowlings
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% 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 upwards. S Lift the cowling fully into position. S Tighten the quick-release fasteners. Take care of the air inlets. Engage the respective shrouds
% % % B. Install the Top Cowling
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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.
(3) Gently pull the edges of the cowling apart and lower the cowling into position.
(4) Tighten the quick-release fasteners.
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% 4. Cleaning and Painting
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% 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.
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% 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. % %
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% B. Paint the Inside of the Cowling
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.
WARNING: DO NOT GET ACETONE ON YOUR SKIN. ACETONE CAN CAUSE SKIN DISEASE. WARNING: DO NOT BREATHE ACETONE FUMES. ACETONE FUMES CAN CAUSE ILLNESS. CAUTION: REMOVE ACETONE AS SOON AS POSSIBLE FROM GFRP. ACETONE CAN CAUSE THE RESIN TO SOFTEN AND FAIL.
(3) Clean the area for painting. Use acetone.
(4) Paint the inside of the cowling with fire protection paint. Obey the paint manufacturer’s instructions.
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