Piper Navajo PA-31 Service Manual page 51

PIPER NAVAJO SERVICE MANUAL
2-45. CLEANING EXTERIOR SURFACES. The airplane should be washed with a mild soap and water.
Harsh abrasive or alkaline soaps, or detergents used on painted or plastic surfaces could make scratches or
cause corrosion of metal surfaces. Cover areas where cleaning solution could cause damage. To wash the
airplane, the following procedure may be used:
a. Flush away loose dirt with water.
b. Apply cleaning solution with a rag, sponge or soft bristle brush.
c. To remove stubborn oil and grease, use a cloth dampened with naphtha.
d. Where exhaust stains exist, allow solution to remain on the surface longer. A cleaning compound
may be used on the stainless steel exhaust shield.
e. Any good automotive wax may be used to preserve the painted surfaces. Soft cleaning cloths or a
chamois should be used to prevent scratches when cleaning or polishing. A heavier coating of wax on the
leading surfaces will reduce the abrasion problems in these areas.
2-46. CLEANING WINDSHIELD AND WINDOWS.
a. Remove dirt, mud, etc. from exterior surface with clean water.
b. Wash with mild soap and water, aircraft plastic cleaner, 50 50 solution isopropanol and water or
aliphatic naphtha type 2. (Do not use plastic cleaners or aliphatic naphtha type 2 on heated glass windshield.)
When wiping the surface, use a soft cloth or sponge and use a straight rubbing motion. Do not harshly rub
surface.
c. Rinse thoroughly and dry. Do not apply wax to heated windshield.
d. Remove oil and grease with a cloth moistened with kerosene.
NOTE
Do not use gasoline, alcohol, benzene, carbon tetrachloride,
thinner,
acetone. window spray cleaners, abraisive materials.
strong acids or bases, methanol or methyl ethyl ketone.
e. After cleaning plastic surfaces, apply a thin coat of hard polishing wax. Rub lightly with a soft
cloth. Do not use a circular motion.
f. A severe scratch or mar in plactic can be removed by using jeweler's rouge to rub out the scratch.
Smooth both sides and apply wax.
g. To improve visibility through windshield and windows during flights through rain. a rain repellent
such as REPECON should be applied to the windshield and windows. The surfaces of the windshield and
windows treated becomes so smooth that water beads up and readily flows off the surface. Apply this product
in accordance with the manufacturer's instructions. (Refer to Table II-IV Consumable Materials for Specifi-
cations and Manufacturer's address.)
2-47. CLEANING HEADLINER, SIDE PANELS AND SEATS.
a. Clean headliner, side panels and seats with a stiff bristle brush and vacuum where necessary.
b. Soiled upholstery, except leather, may be cleaned by using an approved air type cleaner or foam
upholstery cleaner. Carefully follow the manufacturer's instructions. Avoid soaking or harsh rubbing.
CAUTION
Solvent cleaners require adequate ventilation.
eissued: 10/12/79
HANDLING AND SERVICING
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