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NOTE 2 : It is strongly preferable not to use nylon brushes to clean aluminium alloy parts and surfaces. The nylon fibres which form these brushes are often impregnated with silicon carbide, a product which favours the corrosion.
1. EXTERNAL CLEANING OF AIRFRAME
CAUTION : DO NOT USE HIGH PRESSURE WATER (KARCHER).
NOTE : Ensure that holes for water evacuation are not clogged under wing and fuselage. Before external cleaning, fit protection covers on wheels.
Blank all ports, and particularly the two static and dynamic ports, before washing or applying a cleaning compound.
Cleaning and glazing must be carried out in accordance with Paragraph 3. Powder products are prohibited.
To remove dust or insect marks on the leading edges and on the engine cowling, use a neutral soap and a sponge. Rinse the surfaces with water to completely eliminate the soap.
In all cases, rinse and dry thoroughly using chamois leather.
2. CLEANING OF CORROSION POINTS
Refer to 20-00-04.
3. CLEANING OF PAINTED SURFACES
Generally, painted surfaces can be kept bright by washing with water and neutral soap, followed by a rinse with water and drying with clothes or a chamois leather. Harsh or abrasive soaps or detergents which cause corrosion or scratches should never be used. Remove stubborn oil and grease with a cloth.
Waxing is unnecessary to keep the painted surfaces bright. However, if desired, the aircraft may be waxed with a good automotive wax. A heavier coating of wax on the leading edges of the wings and tail and on the engine cowlings and propeller cone will help reduce the abrasion encountered in these areas.
When the aircraft is parked outside in cold climates and it is necessary to remove ice before flight, care should be taken to protect the painted surfaces during ice removal with chemical liquids. Isopropyl alcohol (TB 10-002) will satisfactorily remove ice accumulations without damaging the paint. However keep the isopropyl alcohol (TB 10-002) away from the windshield and cabin windows since it will attack the plastic and may cause it to craze.
WA
Validity : S / N 1 - 9999 12-20-03Page 201
(BA) JUN 02
4. CLEANING OF LANDING GEAR AND TIRES
Clean the landing gear with usual products and avoid spilling any on the joints and on the tires which must be cleaned with water only. In case fuel or thinner is spilt over the tires, immediately wipe them off and rinse thoroughly with water.
Clean the slide rod scraper rings and hinge ball joints with a cloth only, without any cleaning product.
5. PROPELLER CARE
Preflight inspection of propeller blades for nicks, and clean them periodically with soft soapy water and a rinse of clean water without pressure to remove grass and bug stains will assure long blade life. Small nicks on the propellers, particularly near the tips and on the leading edges, should be dressed out as soon as possible since these nicks produce stress concentrations, and if ignored, may result in cracks. Never use an alkaline cleaner on the blades.
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TB20 MAINTENANCE MANUAL 12 SERVICING TB20飞机维护手册 12 保养(54)
