Hartzell B-4270, Руководство пользователя

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MAINTENANCE PRACTICES
61-00-36
Page 6-20
Rev. 2 Feb/17
Propeller Owner's Manual
136
B. Painting of Aluminum Blades
WARNING: CLEANING AGENTS (ACETONE, #700
LACQUER THINNER, AND MEK), ARE
FLAMMABLE AND TOXIC TO THE SKIN,
EYES, AND RESPIRATORY TRACT. SKIN
AND EYE PROTECTION ARE REQUIRED.
AVOID PROLONGED CONTACT. USE IN
WELL VENTILATED AREA.
CAUTION: ANY REFINISHING PROCEDURE
CAN ALTER PROPELLER BALANCE.
PROPELLERS THAT ARE OUT OF
BALANCE MAY EXPERIENCE EXCESSIVE
VIBRATIONS WHILE IN OPERATION.
(1) Using a clean cloth moistened with acetone, #700 lacquer
thinner, or MEK, wipe the surface of the blade to remove
any contaminants and permit the solvent to evaporate.
(2) Using 120 to 180 grit sandpaper, sand to feather the
existing coatings away from the eroded or repaired area.
(a) Paint erosion is typically very similar on all blades
in a propeller assembly. If one blade has more
extensive paint erosion, e.g., in the tip area, sand all
the blades in the tip area to replicate the repair of the
most severely damaged blade tip. This practice is
essential in maintaining balance after refinishing.
(3) Using acetone, #700 lacquer thinner, or MEK, wipe the
surface of the blade and permit the solvent to evaporate.
(4) Before refinishing the blades, apply a corrosion preventive
coating to the bare aluminum surface.
(a) Tasdip AL 100, Chromicote L-25, Alodine 1200,
Alodine 1200S, Alodine 1201, Iridate 14-2, Birite
Guard-Aldip CF, and Brush Alochrome 1200 are
approved chemical conversion coatings.
(b) Apply these coatings in accordance with the
directions provided by the product manufacturer.
(5) Apply masking material for the anti-icing or de-ice boot
and tip stripes, as needed.